a=input()
if a.isupper():
    print('upper')
elif a.islower():
    print('lower')
elif a.isdigit():
    print('digit')
else:
    print('other')

#include <stdio.h>
int main()
{
    char s;
    scanf("%c",&s);

    if (s>='A'&&s<='Z'){
        printf("upper");
    }
    else if (s>='a'&&s<='z'){
        printf("lower");
    }
    else if (s>='0'&&s<='9'){
        printf("digit");
    }
    else
        printf("other");
    
    return 0;
}

#include <stdio.h>

int main()
{
    char a;
    scanf ("%c",&a);
    if (a>=65&&a<=90)
    {
        printf ("upper");
    }
    else if (a>=97&&a<=122)
    {
        printf ("lower");
    }
    else if (a>=48&&a<=57)
    {
        printf ("digit");
    }
    else
    {
        printf ("other");
    }
    return 0;
}