#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

void Citire(char* s)
{
    ifstream fin("sir.in");
    fin.getline(s, 99);
    fin.close();
}

void Secv(char* s)
{
    char secv[99], secvmx[99];
    int lg = -1, lgmx = -1;

    for(int i = 0; s[i] != 0; i++)
    {
        if(s[i] <= s[i+1])
        {
            lg++;
            strncpy(secv+lg, s+i, 2);
        }
        else
        {
            if(lg > lgmx)
            {
                strcpy(secvmx, secv);
                lgmx = lg;
            }
            lg = -1;
        }
    }
    cout << lgmx << "\n";
    cout << secvmx;
}


int main()
{
   char sir[99];
   Citire(sir);
   Secv(sir);
   cout << "\n";
   return 0;
}