Given the following code and input arrays, what is the final output printed?

Given the following code and input arrays, what is the final output printed?

def minDominoRotations(A, B):
    def check(x):
        rotations_a = rotations_b = 0
        for i in range(len(A)):
            if A[i] != x and B[i] != x:
                return -1
            elif A[i] != x:
                rotations_a += 1
            elif B[i] != x:
                rotations_b += 1
        return min(rotations_a, rotations_b)

    rotations = check(A[0])
    if rotations != -1:
        return rotations
    else:
        return check(B[0])

A = [3,5,1,2]
B = [3,6,3,3]
print(minDominoRotations(A, B))