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

#define N 20


int comp (const void* str1, const void* str2) {

    return (strcmp(*(char**)str1, *(char**)str2));
}


int count (char* text) {

    int mem = N, i = 1, len, counter = 1, max = 1;

    char** array = (char**)malloc(mem*sizeof(char*));

    array[0] = strtok(text," ");
    while (array[i-1] != NULL) {

        array[i] = strtok(NULL," ");
        i++;

        if (mem == i) {

        mem += mem;
        realloc(array, mem*sizeof(char*));
        }
    }

    len = i-1;

 //   for ( i=0; i < len; i++) {

 //       printf("%s\n", array[i]);
 //   }
    i = 0;

    if (!len) {

        return 0;
    }
    qsort(array, len, sizeof(char*), comp);


    while ( i < len-1 ){

        i++;
        if ( !strcmp(array[i], array[i-1]) ) {

            counter++;
        }
        //printf("%d", len);
        if ( strcmp(array[i], array[i-1]) || i == len - 1) {

            if (max < counter) {

                max = counter;
                counter = 1;
            }
        }
    }
    return max;
}

int main() {

    int n = 0;

    char* text = (char*) malloc (201*sizeof(char));
    fgets(text, 201, stdin);

    n = count(text);
    printf("%d", n);

}