void main() {
    int a = 0;
    while(a < 5) {
        print ++a;
    }

    a = 0;
    while(a < 5) {
        print a;
        ++a;
    }
    
    long b = 0L;
    while(b < 5L) {
        print ++b;
    }

    b = 0L;
    while(b < 5L) {
        print b;
        ++b;
    }
}