#include<stdio.h>
#include(ctype.h)
int main()
{
    char ch;
    int i,j,k;
    scanf ("%c",&ch);
    {
        if(i=0,i=1;++i)
        printf("invalid input ");
    }
    else(ch<=1||ch<-20);
    {
       print("today is tuesday");
    }
    return 0;
}