#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
string a[32];
 
bool vis[1002];
void reset(void){
 a[1]=" azyxwvutsrqponmlkjihgfedc";
a[2]=" bazyxwvutsrqponmlkjihgfed";
a[3]=" cbazyxwvutsrqponmlkjihgfe";
a[4]=" dcbazyxwvutsrqponmlkjihgf";
a[5]=" edcbazyxwvutsrqponmlkjihg";
a[6]=" fedcbazyxwvutsrqponmlkjih";
a[7]=" gfedcbazyxwvutsrqponmlkji";
a[8]=" hgfedcbazyxwvutsrqponmlkj";
a[9]=" ihgfedcbazyxwvutsrqponmlk";
a[10]=" jihgfedcbazyxwvutsrqponml";
a[11]=" kjihgfedcbazyxwvutsrqponm";
a[12]=" lkjihgfedcbazyxwvutsrqpon";
a[13]=" mlkjihgfedcbazyxwvutsrqpo";
a[14]=" nmlkjihgfedcbazyxwvutsrqp";
a[15]=" onmlkjihgfedcbazyxwvutsrq";
a[16]=" ponmlkjihgfedcbazyxwvutsr";
a[17]=" qponmlkjihgfedcbazyxwvuts";
a[18]=" rqponmlkjihgfedcbazyxwvut";
a[19]=" srqponmlkjihgfedcbazyxwvu";
a[20]=" tsrqponmlkjihgfedcbazyxwv";
a[21]=" utsrqponmlkjihgfedcbazyxw";
a[22]=" vutsrqponmlkjihgfedcbazyx";
a[23]=" wvutsrqponmlkjihgfedcbazy";
a[24]=" xwvutsrqponmlkjihgfedcbaz";
a[25]=" yxwvutsrqponmlkjihgfedcba";
a[26]=" zyxwvutsrqponmlkjihgfedcb";
 return ;
}
 
 
char work(int i,char c,char cc)
{
	char ch;
	int c1=(int)c-96;
	int c2=(int)cc-96;
	ch=a[c1][c2];
	if(vis[i])
		ch-=32;
	return ch;
}
int main()
{
	freopen("vigenere.in","r",stdin);
	freopen("vigenere.out","w",stdout);
	reset();
	string key,mi;
	cin>>key>>mi;
	int lenk=key.size();
	for(int i=0;i<=lenk-1;i++)
		if(key[i]>=65&&key[i]<97)
			key[i]+=32;
	for(int i=0;i<=mi.size()-1;i++)
		if(mi[i]>=65&&mi[i]<97)
		{
			mi[i]+=32;
			vis[i+1]=1;
		}
	key=' '+key;
	int lenmi=mi.size();
	mi=' '+mi;
	for(int i=1;i<=lenmi;i++)
	{
		int pos=i%lenk;
		if(!pos)
			pos=lenk;
		cout<<work(i,mi[i],key[pos]);
	}
}