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 Pascal (FPC 2.6.2) (judge verdict: Wrong Answer)

program unbalanced;
uses crt;
var
s: String;
a,b,x,i: Integer ;
cek: Boolean;
begin
cek:= false;
  ReadLn(s);
  a:=Length(s);
  b:=3;
  for i:=1 to (a-2) do
  x:=1;
    begin
    if (s[i]=s[i+1]) or (s[i]=s[i+2])
    or (s[i+1]=s[i+2])
    then WriteLn(i,' ',i+2);
    cek:=true;
    end;   
if cek = false then WriteLn(-1,' ',-1);  
end.