#include <stdio.h>

char castToBig(char ch){
    return ch+32;
}

char castToSmall(char ch){
    return ch-32;
}

int isBig(char ch){
    return ch >= 'A' && ch <= 'Z';
}

int isSmall(char ch){
    return ch >= 'a' && ch <= 'z';
}

int main()
{
    char cur;
    int make_big = 0;
    printf("yahani");

    while(cur != '\n'){
        printf("yahani");
        scanf("%c", &cur);

        if(cur == '_'){
            make_big = 1;
            continue;
        }

        if(make_big){
            make_big = 0;

            if(isSmall(cur))
                cur = castToBig(cur);
        } else {
            if(isBig(cur))
                cur = castToSmall(cur);
        }

        printf("%c", cur);
    }
}