#include<stdio.h>
int main()
{
    char ch;
    scanf("%c", &ch);
    int is_uppercase = (ch >='A' && ch <= 'Z');
    int conversion_value = ('a' - 'A') * is_uppercase;
    int result_ascii = ch + conversion_value;
    printf("%d\n",result_acii);
    return 0;
}