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: Runtime Error)

fun main(arg: Array<String>) {
    val N = next()
    val L = N.length
    val M = N.groupBy { it }.map { it.key to it.value.size }.sortedByDescending { it.second }
    if (L < 2 || M.first().second < 2) return println("-1 -1")
    val P = Array(26) { mutableListOf<Int>() }
    N.withIndex().forEach {
        val n = it.value - 'a'
        P[n].add(it.index)
    }
    val T = M.first()
    var l = P[T.first - 'a'].first()
    var r = P[T.first - 'a'].last()
    val n = r - l + 1
    var d = (T.second - 1) - n
    if (d > 0)
        if (l >= d) {l -= d; d = 0 }
        else { d -= l; l = 0 }
    if (d > 0)
        if (d + r < L) r += d
        else {l = -2; r = -2}
    println("${l + 1} ${r + 1}")
}

fun next() = readLine()!!
fun nextInt(delta: Int = 0) = Integer.parseInt(next()) + delta
fun nextLong() = next().toLong()
fun nextDouble() = next().toDouble()
fun listOfString() = next().split(" ")
fun listOfInt() = listOfString().map(String::toInt)
fun listOfLong() = listOfString().map(String::toLong)
fun listOfInt(delta: Int = 0) = listOfString().map { Integer.parseInt(it) + delta }