#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]={0}; char b[1001]={0}; int n1,n2,num1,num2; cin>>n1>>n2; n1=strlen(a); n2=strlen(b); for(int i=0;i<n1;i++) { if(a[i]>='0'&&a[i]<='9') num1++; } for(int 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[i]; } cout<<b2[num2-1]<<endl; } return 0; }