def ToClean(environ):
    r = "right"
    l = "left"
    d = "down"
    c = "clean"
    direction = []
    last_d = 0
    first_d = []
    robot = 0
    count = 0
    count1 = 0

    for i, item in enumerate(environ):
        first_d.append(environ[i].index("d"))

    for i, item in enumerate(environ):
        for j, v in enumerate(item):
            if v == "d":
                last_d = j

        while robot <= last_d:
            if item[robot] == "d":
                direction.append(c)
                if robot < last_d:
                    direction.append(r)
            elif item[robot] == "r":
                direction.append(r)
            elif item[robot] == "c":
                direction.append(r)
            robot += 1
        else:
            if count != len(environ) and count1 < len(first_d)-1:
                while last_d > first_d[count1+1]:
                    direction.append(l)
                    last_d -= 1
                    robot = first_d[count1+1]
                else:
                    direction.append(d)
        count1 += 1
        count = 0
    return direction