Problem:
Score : 400 points

Problem Statement

Given a string t, we will call it unbalanced if and only if the length of t is at least 2, and more than half of the letters in t are the same. For example, both voodoo and melee are unbalanced, while neither noon nor a is.

You are given a string s consisting of lowercase letters. Determine if there exists a (contiguous) substring of s that is unbalanced. If the answer is positive, show a position where such a substring occurs in s.

Constraints

2 ≦ |s| ≦ 10^5

s consists of lowercase letters.

Partial Score

200 points will be awarded for passing the test set satisfying 2 ≦ N ≦ 100.

Input

The input is given from Standard Input in the following format:

s

Output

If there exists no unbalanced substring of s, print -1 -1.

If there exists an unbalanced substring of s, let one such substring be s_a s_{a+1} ... s_{b} (1 ≦ a < b ≦ |s|), and print a b. If there exists more than one such substring, any of them will be accepted.

Sample Input 1

needed

Sample Output 1

2 5

The string s_2 s_3 s_4 s_5 = eede is unbalanced. There are also other unbalanced substrings. For example, the output 2 6 will also be accepted.

Sample Input 2

atcoder

Sample Output 2

-1 -1

The string atcoder contains no unbalanced substring.

Solution in Ruby (2.3.3) (judge verdict: Wrong Answer)

a_data = STDIN.gets

a_data = a_data.split("")

i = 0
loop{
    if a_data[i] == a_data[i+1]
        j = i
        loop{
            if a_data[i] != a_data[i+1]
                break
            elsif i > a_data.length
                STDOUT.print(j+1)
                STDOUT.print(" ")
                STDOUT.print(a_data.length)
                break
            else
                i = i + 1
            end
        }
        i = i + 1
        STDOUT.print(j+1)
        STDOUT.print(" ")
        STDOUT.print(i+1)
        break
    elsif i > a_data.length
        break
    else
        i = i + 1
    end
}

if a_data.length < 2
    puts "-1 -1"
end