diff --git a/chapter01/1.4 - PalinPerm/palinPerm.js b/chapter01/1.4 - PalinPerm/palinPerm.js
index ca46496..9629585 100644
--- a/chapter01/1.4 - PalinPerm/palinPerm.js	
+++ b/chapter01/1.4 - PalinPerm/palinPerm.js	
@@ -29,6 +29,34 @@ var palinPerm = function(string) {
   return isPerm;
 };
 
+const getCharCode = (c, min = 'a'.charCodeAt(), max = 'z'.charCodeAt()) => {
+    cCharCode = c.charCodeAt();
+    return min <= cCharCode && cCharCode <= max
+           ? cCharCode - min : -1;
+};
+
+const toggleBit = (bitVector, index) => {
+    if(index < 0) return bitVector;
+    return bitVector ^ (1 << index);
+};
+
+const getBitVector = str => {
+    let bitVector = 0;
+    for(let c of str) {
+        bitVector = toggleBit(bitVector, getCharCode(c));
+    }
+    return bitVector;
+};
+
+const palinPermBitVector = str => {
+    const bitVector = getBitVector(str);
+    return !(bitVector && (bitVector & (bitVector - 1)));
+};
+
 // TESTS
 console.log(palinPerm('Tact Coa'), 'true');
-console.log(palinPerm('Tact boa'), 'false');
\ No newline at end of file
+console.log(palinPerm('Tact boa'), 'false');
+console.log(palinPermBitVector('cviic'), 'true');
+console.log(palinPermBitVector('civie'), 'false');
+console.log(palinPermBitVector('damma'), 'true');
+console.log(palinPermBitVector('aadmn'), 'false');