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