int offset = 0;

int get() {
    return "hello\\n\\tworld\\\\\\'\\\"\\0\r\t\0"[offset++];
}

int putchar(int ch);

int main() {
    char ch;
    while ((ch = get()) != 0) {
        if (ch == '\\') {
            ch = get();
            if (ch == 'n') {
                ch = '\n';
            } else if (ch == 't') {
                ch = '\t';
            } else if (ch == 'r') {
                ch = '\r';
            } else if (ch == '0') {
                break;
            } else if (ch == '\\') {
                ch = '\\';
            } else if (ch == '\'') {
                ch = '\'';
            } else if (ch == '\"') {
                ch = '\"';
            } else {
                break;
            }
        }
        putchar(ch);
    }
    return 0;
}