#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(){ int n1,n2,num1=0,num2=0,i; char a[1000]={0},b[1000]={0}; cin>>a>>b; n1=strlen(a); n2=strlen(b); for(i=0;i<n1;i++){ if(a[i]>='0'&&a[i]<='9'){ num1++; } } for(i=0;i<n2;i++){ if(b[i]>='0'&&b[i]<='9'){ num2++; } } if(num1>num2){ for(i=n2-1;i>=0;i--){ cout<<b[i]; } cout<<a[num1-1]<<endl; } else{ for(i=n1-1;i>=0;i--){ cout<<a; } cout<<b[num2-1]<<endl; } return 0; }