#include <cstdio>
#include <cassert>

// Compile with:
// cl /O2 mainU2.cpp

static char toASCIILower(char c)
{
    return c | ((c >= 'A' && c <= 'Z') << 5);
}

int main(int, char**)
{
    volatile char c1 = 'I';
    volatile char c2 = 'I';

    do {
        c1--;
        c2--;
        if (toASCIILower(c1) == toASCIILower(c2))
            printf("OK\n");
        else
            printf("WRONG1!\n");
    } while (c1 && c2);
    return 0;
}