#include <iostream>
#include<string.h>
using namespace std;

int main()
{char s1[101],s2[101];
 int x,y;
 cin.get(s1,100);
 cin.get();
 cin.get(s2,100);
 x=strlen(s1)-1;
 y=strlen(s2)-1;
 if(s1[x]!=s2[y])
    cout<<"nu";
 else
    while(s1[x]==s2[y])
 {
     x--;
     y--;
     if(x<0 || y<0)
break;

 }
for(int i=x+1;i<strlen(s1);i++)
    cout<<s1[i]<<" ";

    return 0;
}