created function for stretch assignment

Author: bscott519

lesson_06/benjaminscott/README.md

@@ -0,0 +1,33 @@
+# Stretch Assignment
+
+```
+function isValidAlphaAbbreviation(word: string, abbr: string): boolean {
+    var letterToNum = { "a": 1, "b": 2, "c": 3, "d": 4, "e": 5, "f": 6, "g": 7, "h": 8, "i": 9, "j": 10, "k": 11, "l": 12, "m": 13, "n": 14, "o": 15, "p": 16, "q": 17, "r": 18, "s": 19, "t": 20, "u": 21, "v": 22, "w": 23, "x": 24, "y": 25, "z": 26 };
+    let wordIndex = 0;
+    let abbrIndex = 0;
+
+    while (abbrIndex < abbr.length && wordIndex < word.length) {
+        if (abbr[abbrIndex] === word[wordIndex]) {
+            wordIndex++;
+
+        } else {
+            const currentAbbrChar = abbr[abbrIndex];
+
+            if (currentAbbrChar < 'a' || currentAbbrChar > 'z') {
+                return false;
+            }
+
+            const targetNumber = letterToNum[currentAbbrChar];
+
+            wordIndex += targetNumber;
+        }
+
+        abbrIndex++;
+    }
+
+    if (abbrIndex === abbr.length && wordIndex === word.length) {
+        return true;
+    }
+    return false;
+}
+```