#include<iostream>
#include<cstring>
#include<climits>
using namespace std;
char x[105],y[105],*p,r[105];
int ap[105];
int main ()
{
    int n,ma,b,i,j;
    ma=INT_MIN;
    cin.getline(x,105);
    p=strtok(x," ");
    while(p!=0)
    {
        for(i=0;i<strlen(p);i++)
        {
            ap[p[i]-48]++;
        }
        p=strtok(0," ");
    }
    for(i=0;i<=9;i++)
    {
        if(ap[i]>ma)
        {
            ma=ap[i];
            n=i;
        }
    }
    cout<<n;
}
59