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 Kotlin (1.0.0) (judge verdict: Wrong Answer)

fun main(args: Array<String>) {
    val s = readInputLine().toCharArray()
    val len = s.size

    val charCnt = IntArray('z' - 'a' + 1)
    
    for (c in s) {
        charCnt[c - 'a']++
    }
    
    for (i in 0 until len - 1) {
        for (c in 0 until 'z' - 'a') {
            if (charCnt[c] > (len - i) / 2) {
                println("${i + 1} ${len}")
                return
            }
        }
        
        for (j in len - 1 downTo i + 2) {
            charCnt[s[j] - 'a']--
            for (c in 0 until 'z' - 'a') {
                if (charCnt[c] > (j - i) / 2) {
                    println("${i + 1} $j")
                    return
                }
            }
        }
        
        for (j in len - 1 downTo i + 2) {
            charCnt[s[j] - 'a']++
        }
        
        charCnt[s[i] - 'a']--
    }
    
    println("-1 -1")
}

fun readInputLine(): String {
    return readLine()!!
}