def squarefinder(game):
    countofsquares = 0
    for line in game:
        parallel = False
        left = False
        right = False
        if line[0][1] == line[1][1]:
            if [(line[0][0],line[0][1]-1),(line[1][0],line[1][1]-1)] in game:
                parallel = True
            if [(line[0][0],line[0][1]),(line[1][0]-1,line[1][1]-1)] in game:
                left = True
            if [(line[0][0]+1,line[0][1]),(line[1][0],line[1][1]-1)] in game:
                right = True
            if parallel and left and right:
                countofsquares += 1
    return(countofsquares)
