#include <stdio.h>

enum
{
    SMALL_START = 11,
    BIG_START = 37,
    THIRD_BIT = 3,
    SECOND_BIT = 2,
    MAX_CODE = 63
};

int
main(void)
{
    int curr = getchar();

    while (curr != EOF) {
        _Bool skip = 0;

        if ('0' <= curr && curr <= '9') {
            curr -= '0' - 1;
        } else if ('a' <= curr && curr <= 'z') {
            curr -= 'a' - SMALL_START;
        } else if ('A' <= curr && curr <= 'Z') {
            curr -= 'A' - BIG_START;
        } else {
            skip = 1;
        }

        if (!skip) {
            curr &= ~(1 << SECOND_BIT);
            curr ^= (1 << THIRD_BIT);

            if (curr == 0) {
                putchar('@');
            } else if (curr == MAX_CODE) {
                putchar('#');
            } else if (BIG_START <= curr) {
                putchar(curr - BIG_START + 'A');
            } else if (SMALL_START <= curr) {
                putchar(curr - SMALL_START + 'a');
            } else {
                putchar(curr - 1 + '0');
            }
        }
        curr = getchar();
    }
    return 0;
}