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

int main(void) {
    char s[130] = {0};
	char *p = s;
	int i = 0;
	fgets(s, 129, stdin);
	while (*p != '\n' && *p != '\0') {
		i++;
		p++;
	}
	printf("len : %d\n", i);
	return EXIT_SUCCESS;
}