#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char s[201],A,B; cin>>s>>A>>B; int i=0; while(s[i]!='\0'){ if(i[s]==A){ s[i]=B; }i++; } cout<<s<<endl; return 0; }