def dc(read):  # Difference Checker
    seq = read[1]
    d = len(seq) - len(ref)
    # print("d: "+str(d))
    if d > 0:
        # functie maken die sequentie korter maakt
        # seq returnen
        return "s", seq  # sequence longer than reference
    elif d < 0:
        return "r", seq  # reference longer than sequence
    elif d == 0:
        return "p", seq  # sequence equally long as reference