
int a[1111];  //?????????i???????
char s[1111];//?????

int i, n = 0;
int main() {
 cin >> s;
 char b[2];
 b[0]=s[0];
 for (i = 0; s[i]; ++i)   //???s?i????
  if (s[i] == b[0]) a[++n] = i;  //?????????????
  else cout << a[n--] << " " << i << endl;//?????????????????
 return 0;
}