#include <stdio.h>

int main() {
    char a[10];
    scanf("%s",a);

    for(int i=0;a[i]!='\0';i++){
        if(a[i]>='a' && a[i]<='z'){
            if(i % 2 == 0){
                a[i] = a[i] - ('a' - 'A');// a=97 A=65 ..-32 then all letters become small
            }
        }
    }
    printf("%s",a);
}