import std.algorithm, std.container, std.conv, std.math, std.range, std.typecons, std.stdio, std.string;

auto rdsp(){return readln.splitter;}
void pick(R,T)(ref R r,ref T t){t=r.front.to!T;r.popFront;}
void readV(T...)(ref T t){auto r=rdsp;foreach(ref v;t)pick(r,v);}

void main()
{
  string s; readV(s);

  foreach (i; 0..s.length-1) {
    if (s[i] == s[i+1]) {
      writeln(i+1, " ", i+2);
      return;
    }

    if (i < s.length-2 && s[i] == s[i+2]) {
      writeln(i+1, " ", i+3);
      return;
    }
  }

  writeln(-1, " ", -1);
}
