#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(){ string a,b; cin>>a>>b; for(int i=0;i<a.size();i++){ if('A'<=a[i]&&a[i]<='Z'){ cout<<b[a[i]-'A']; } else{ cout<<b[a[i]-'a']; } } return 0; }