#include <stdio.h>
#include <ctype.h>

int main() {
    char ch;
    printf("enter the character: ");
    scanf("%c",&ch);
    if (isupper(ch)){
        printf("\nthe alphabet is in uppercase");
    }
    else if (islower(ch)){
        printf("\nthe alphabet is in lowercase");
    }
    else{
        printf("\nprint a valid input");
    }
    return 0;
}