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

int main (void){
	char *one = "::::o::::";
	char *two_a = "o:::::::o";
	char *two_b = "::o:::o::";
	char *three_a = "o:::o:::o";
	char *three_b = "::o:o:o::";
	char *four = "o:o:::o:o";
	char *five = "o:o:o:o:o";
	char *six_a = "o:oo:oo:o";
	char *six_b = "ooo:::ooo";
	char *vstup = malloc(3*sizeof(char));
	char *radek_b = malloc(3*sizeof(char));
	char *radek_c = malloc(3*sizeof(char));
	
	scanf("%s", vstup);
	scanf("%s", radek_b);
	scanf("%s", radek_c);
	
	strcat(vstup, radek_b);
	strcat(vstup, radek_c);
	
	if (strcmp(vstup, two_a) == 0)
		printf("1\n");
	else if (strcmp(vstup, two_a) == 0)
		printf("2\n");
	else if (strcmp(vstup, two_b) == 0)
		printf("2\n");
	else if (strcmp(vstup, three_a) == 0)
		printf("3\n");
	else if (strcmp(vstup, three_b) == 0)
		printf("3\n");
	else if (strcmp(vstup, four) == 0)
		printf("4\n");
	else if (strcmp(vstup, five) == 0)
		printf("5\n");
	else if (strcmp(vstup, six_a) == 0)
		printf("6\n");
	else if (strcmp(vstup, six_b) == 0)
		printf("6\n");
	else
		printf("unknown\n");
	free(vstup);
	free(radek_b);
	free(radek_c);
	
	return 0;
}