#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(){ char a[1001]={},x[1001]={},s,u,n1=0,n2=0; cin>>a; cin>>x; u=strlen(a); s=strlen(x); for(int i=1;i<=u;i++){ if(a[i]>'0'&&a[i]<'9') n1++; } for(int i=1;i<=u;i++){ if(a[i]>'0'&&a[i]<'9') n2++; } if(n1>n2){ for(int i=s-1;i>=0;i--)cout<<x[i]; cout<<a[n1-1]<<endl; return 0; } else{ for(int i=u-1;i>=0;i--)cout<<a[i]; cout<<x[n2-1]<<endl; return 0; } return 0; }