def put_flat_sharp(step, acc):
    """get a step and its acc and return the note in tpc notation, return str"""
    ret_note = step
    ret_acc = acc
    if ret_acc > 0:
        for l in range(ret_acc):
            ret_note = ret_note + '#'
    if ret_acc < 0:
        ret_acc = abs(ret_acc)
        for l in range(ret_acc):
            ret_note = ret_note + 'b'
    return ret_note
