a = [
    [1.1, 2, 3, 4],
    [2, 2, 2, 2],
    [2, 3, 2, 3],
    [3, 4, 4, 3],
    [1, 1, 1, 2],
    [3, 1, 2, 3]
]
for r in a:
    s1 = set(r)
    for i in range(len(r)):
        j = i + len(s1)
        s2 = set(r[i:j])
        if (s1 == s2):
            print("From " + str(i) + " to " + str(j))
            break