//*******************************************
//*????????                         *
//*?  ?????                           *
//*?  ??1000012806                       *
//*?????2010.12.31                     *
//*******************************************
void youxi(int);
char boy;                                    //????????????
char paidui[100] = {0};                      //?????????
int main()
{
	cin.getline(paidui, 100);
	boy = paidui[0];                         //??????
	youxi(0);                                //????????
	return 0;
}
void youxi(int num)
{
	if (paidui[num] == 0)                    //?????????????????
		return;
	else
	{
		if (paidui[num] == boy)              //??????????????????
			youxi(num + 1);
		else
		{
			int i;
			for (i = num; i >= 0; i--)       //???????
			{
				if (paidui[i] == boy)
				{
					cout<<i<<' '<<num<<endl; //????????????????????????
					paidui[i] = ' ';
					paidui[num] = ' ';
					break;
				}
			}
			youxi(num + 1);                  //?????
		}
		return;
	}
}
