#include <stdio.h>
int main() {
    int day = 8;
    
    
    switch (day) {
    
    case 1:
        printf("monday");
        break;
    
    case 2:
        printf("tuesday");
        break;
    
    case 3:
        printf("wednesday");
        break;
    
    case 4:
        printf("thursday");
        break;

    case 5:
        printf("friday");
        break;
    
    case 6:
        printf("saturday");
        break;

    case 7:
        printf("sunday");
        break;

    default:
     printf("there's 7 day in week!");
     
    }


}