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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;

public class Main{

  public static void main(String args[]){

    Scanner sc = new Scanner(System.in);
    char[] s = sc.next().toCharArray();

    for(int i=0; i<s.length; i++){
      char s_tmp = s[i];

      int t_count = 1;
      int f_count = 0;
      
      for(int j=i+1; j<s.length; j++){ 
        if(s[j]==s_tmp){
          t_count++;
          if(t_count>f_count){
            pl((i+1) + " " + (j+1));
            return;
          }
        }else{
          f_count++;
          if(t_count>f_count){
            pl((i+1) + " " + (j+1));
            return;
          }else if(t_count<f_count){
            break;
          }
        }
      }

    }
    pl("-1 -1");

  }

  private static void pr(Object o){
    System.out.print(o);
  }
  private static void pl(Object o){
    System.out.println(o);
  }

}