n, k = map(int, input().split())
a = list(map(int, input().split()))
lessons = [0] * k
i, j = 0, 0
l, r = 0, n
c = k
while i < n:
    while c != 0 and i < n - 1:
        if lessons[a[i] - 1] == 0:
            c -= 1
        lessons[a[i] - 1] += 1
        if c != 0:
            i += 1

    while j <= i - k + 1:
        lessons[a[i] - 1] -= 1
        if lessons[a[i] - 1] == 0:
            break
        j += 1

    if r - l > i - j >= k - 1 and i <= n:
        l, r = j, i

    if i - j == k - 1:
        break
    i += 1
    j += 1
    c = 1
print(l, r)