diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..bf65f0e
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,17 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${workspaceFolder}\\src\\findLines.js"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/france.txt b/france.txt
index bef2369..f2c7458 100644
--- a/france.txt
+++ b/france.txt
@@ -21609,7 +21609,7 @@ DP 43:55:30 N 005:38:38 E
 
 ** 200 Para LILLE MARCQ **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Lille Marcq 122,000
 AH FL140
 AL GND
@@ -21619,7 +21619,7 @@ DC 1
 
 ** 203 Para LA FLECHE **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para La Fleche 123,5 ou Nantes Info
 AH FL115
 AL GND
@@ -21629,7 +21629,7 @@ DC 1
 
 ** 208 Para FRETOY LE CHATEAU**
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Fretois le Chateau
 AH FL135
 AL GND
@@ -21639,7 +21639,7 @@ DC 1
 
 ** 217 Para NEUVY LE ROI **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Neuvy le Roi Tours Info 121,0
 AH FL105
 AL GND
@@ -21649,7 +21649,7 @@ DC 1
 
 ** Para 226 PERONNE**
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Peronne 129,800
 AH FL135
 AL GND
@@ -21659,7 +21659,7 @@ DC 1
 
 ** Para 228 CHARLEVILLE**
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Charleville 126,850
 AH FL150
 AL GND
@@ -21669,7 +21669,7 @@ DC 1
 
 ** 237 Para MAGNY COURS **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Magny Cours Nevers Info 120.6
 AH FL140
 AL GND
@@ -21680,7 +21680,7 @@ DC 1
 
 ** Para 241 MERVILLE**
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Merville 119,075
 AH FL140
 AL GND
@@ -21690,7 +21690,7 @@ DC 1
 
 ** Para 271 MAUBEUGE**
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Maubeuge 121,000
 AH FL140
 AL GND
@@ -21700,7 +21700,7 @@ DC 1
 
 ** 301 Para LASCLAVERIES **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para 301 Pyr n es APP 128.8
 AH FL140
 AL GND
@@ -21711,7 +21711,7 @@ DC 1
 
 ** 302 Para HANDIA **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Handia Biarritz 125,6
 AH FL115
 AL GND
@@ -21721,7 +21721,7 @@ DC 1
 
 ** 304 Para BOULOC **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN ParaBouloc 123.35
 AH FL115
 AL GND
@@ -21732,7 +21732,7 @@ DC 1
 
 ** 378 Para LA REOLE **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para La Reole 123.35
 AH FL135
 AL GND
@@ -21743,7 +21743,7 @@ DC 1
 
 ** 381 Para MONTPEZAT **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para
 AH FL040
 AL GND
@@ -21753,7 +21753,7 @@ DC 0.76
 
 ** 391 Para CAHORS **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Cahors 119.225 & 133.725 >FL115 121.250
 AH FL140
 AL GND
@@ -21764,7 +21764,7 @@ DC 2
 
 ** 402 Para AVIGNON PUJAUT **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para 402
 AH FL135
 AL GND
@@ -21774,7 +21774,7 @@ DC 1
 
 ** 403 LE LUC **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para LeLUC 123.0 (SDJF)
 AH FL130
 AL GND
@@ -21785,7 +21785,7 @@ DC 1
 
 ** 417 Para CHAMBERY **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para 417 Chambery Info 123.7 ou Lyon St Ex APP 120.225
 AH FL140
 AL GND
@@ -21796,7 +21796,7 @@ DC 1
 
 ** 422 Para AMBERIEU **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para 422 129.75 ou Lyon St Ex APP 120.225
 AH FL85
 AL GND
@@ -21808,7 +21808,7 @@ DC 1
 ** 436 Para GAP **
 ** Ref : Carte VAC + Note technique FFPS - 15.05.2004 **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN ParaGap Notam
 AH FL195
 AL FL155
@@ -21817,7 +21817,7 @@ DC 2
 
 
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Gap 119.1
 AH FL155
 AL 5300FT MSL
@@ -21827,7 +21827,7 @@ DC 2
 
 
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Gap 119.1
 AH 5300FT MSL
 AL GND
@@ -21842,7 +21842,7 @@ DP 44:25:32 N 006:00:59 E
 
 ** 445 Para PUYRICARD **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Puyricard Marseille Info 120.55
 AH FL140
 AL GND
@@ -21853,7 +21853,7 @@ DC 1
 
 ** 510 Para ARON Lieu dit AEROFERME **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Para Les Ecottays ULM (SDJF)
 AH 4500FT MSL
 AL GND
@@ -21863,7 +21863,7 @@ DC 1
 
 ** Voltige n:6920 ST AUBAN **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Voltige 122.3
 AH FL075
 AL 850FT AGL
@@ -21874,7 +21874,7 @@ DC 0.5
 
 ** Voltige n:6951 VINON **
 AC UNCLASSIFIED
-AY AERIAL_SPORTING_RECREATIONAL
+AY ASR
 AN Voltige 118.15
 AH 5906FT AGL
 AL 2000FT AGL
@@ -30156,7 +30156,7 @@ DP 46:15:27 N 006:51:16 E
 
 ** AWY A29 GIROM-ASPET (21 MAR 2002) **
 AC D
-AY UNCLASSIFIED
+AY AY
 AN AWY A29
 AH FL295
 AL FL115
@@ -30180,7 +30180,7 @@ DP 42:49:00 N 000:53:00 E
 
 ** Airways (AWY) FL115 Max **
 AC D
-AY UNCLASSIFIED
+AY AWY
 AN FL115 Max
 AH FL195
 AL FL115
@@ -30201,7 +30201,7 @@ DP 44:35:31 N 005:01:24 E
 
 ** AWY B31 TMA TLS-PUMAL (21 MAR 2002) **
 AC D
-AY UNCLASSIFIED
+AY AWY
 AN AWY B31
 AH FL295
 AL FL115
diff --git a/src/findLines.js b/src/findLines.js
new file mode 100644
index 0000000..f2bbcbe
--- /dev/null
+++ b/src/findLines.js
@@ -0,0 +1,24 @@
+const fs = require('fs');
+const readline = require('readline');
+
+const findLinesStartingWith = async (filePath, startWord) => {
+  const fileStream = fs.createReadStream(filePath);
+
+  const rl = readline.createInterface({
+    input: fileStream,
+    crlfDelay: Infinity
+  });
+
+  const lines = [];
+
+  for await (const line of rl) {
+    if (line.startsWith(startWord) && !lines.includes(line)) {
+      lines.push(line);
+    }
+  }
+
+  return lines;
+};
+
+var lines = findLinesStartingWith('france.txt', 'AY').then(lines => console.log(lines));
+console.log(lines);
\ No newline at end of file