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 PHP (7.4.4) (judge verdict: Accepted)

<?php

fscanf(STDIN, "%s", $S);
$list = str_split($S);
$buf=[0,0];
foreach($list as $no => $str){
    if($str === $buf[0] || $str === $buf[1]){
        if($no > 1){
            echo ($no-1)." ".($no + 1);
            exit;
        }else{
            if(count($list) == 2){
                echo "1 2";
                exit;
            }
            echo "1 3";
            exit;
        }

    }else{
        $buf = [$buf[1], $str];
    }

}
echo "-1 -1";