func_code_string: #include <bits/stdc++.h>   using namespace std;   char s[200005];   char x[26];   int n, m;   char a, b;   int main() {     while (scanf( %d%d , &n, &m) != EOF) {       for (int i = 0; i < 26; i++) x[i] = i +  a ;       getchar();       scanf( %s , s);       getchar();       for (int i = 0; i < m; i++) {         scanf( %c , &a);         getchar();         scanf( %c , &b);         getchar();         if (a == b) continue;         for (int j = 0; j < 26; j++) {           if (x[j] == a) {             x[j] = b;             continue;           }           if (x[j] == b) {             x[j] = a;             continue;           }         }       }       int k;       for (int i = 0; i < n; i++) {         k = s[i] -  a ;         printf( %c , x[k]);       }       printf(  n );     }     return 0;   }   