#include <stdio.h>
    #include <stdlib.h>
    #include <string.h>

    int foo(char asd[100]){
        int i=1, j, max=1;
        for(j=1;j<=strlen(asd);j++){

            if(asd[j]==asd[j-1]){
                i++;
                if(i>max)
                    max=i;
            }

            else
                i=1;
        }
        return max;
    }

    int main()
    {
        char line[100];
        while (gets(line) != NULL)
            printf("%d\n", foo(line));
        return EXIT_SUCCESS;
    }