#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[200]; cin>>s; int i=0; char a; char b; cin>>a>>b; while(s[i]!='\0') { if(s[i]==a) { s[i]=b; } i++; } cout<<s; return 0; }