//You have 10 rods numbered from 0 to 9. There are three types of rings—red,
// green and blue—being put on the rods. You get a point for each rod that has a
// ring of each color on it, i.e. to get a point you need a red ring, green ring and blue ring on one rod.
//
// A ring put on a rod is represented by two characters—the first
// describes the color of the ring and the second describes which number
// rod it is on from 0 to 9. For example "R8" means that a red ring is being put on the 8th rod.
//
//
// Write a function:
//
//class Solution { public int solution(String S); }
//
//that, given a correct string of length 2N describing the N rings
// put onto rods, returns how many points you will get.
//
// Examples:
// For ""B2R5G2R2,"" the answer is 1
// Given S = "R8R0B5G1B8G8", your answer should be 1.
// You get one point for rings put on the 8th rod (there is one red, one blue and one green ring on it). There is also a red ring on the 0th rod, green on the 1st rod and blue on the 5th rod. You don't get points for them because they don't form a full trio on one rod. There are no rings on any of the other rods.

class Solution {

    public static int solution(String S) {
	
	}


      
}