func_code_string: #include <bits/stdc++.h>   using namespace std;   int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};   long long gcd(long long a, long long b) { return b == 0 ? a : gcd(b, a % b); }   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     long long int n, m;     cin >> n >> m;     string s;     char x, y;     cin >> s;     char ch[26];     for (long long int i = 0; i < 26; i++) {       ch[i] = i +  a ;     }     for (long long int i = 0; i < m; i++) {       cin >> x >> y;       for (long long int j = 0; j < 26; j++) {         if (x == ch[j]) {           ch[j] = y;         } else if (y == ch[j]) {           ch[j] = x;         }       }     }     for (long long int i = 0; i < s.size(); i++) {       cout << ch[s[i] -  a ];     }     return 0;   }   