def pfs(x):
    for i in range(33, 100):
        if i * i == x:
            return True
    return False


for a in range(1, 10):
    for b in range(0, 10):
        if a != b:
            s = a * 1000 + a * 100 + b * 10 + b
        if pfs(s) is True:
            print(s)
/**************************************************************
	Problem: 1092
	User: admin
	Language: Python
	Result: Accepted
	Time:46 ms
	Memory:34480 kb
****************************************************************/