using System;

using System.Collections.Generic;

using System.IO;

​

public class Solution 

{

    public int findnoofdeletions(string line)

    {

        int noofdel = 0;

        char[] arry = line.ToCharArray();

        for (int i = 0; i < arry.Length; i++)

        {

            if((i+1) < arry.Length && arry[i].Equals(arry[i+1]))

               noofdel+=1;

        }              

               return noofdel;

    }

    public static void Main(String[] args) 

    {

        Solution sol = new Solution();

        List <int> result = new List<int>();

        int T = Convert.ToInt32(Console.ReadLine());

        for (int i = 0; i < T; i++)        

                    result.Add(sol.findnoofdeletions(Console.ReadLine()));  

        foreach(int res in result)

            Console.WriteLine(res);

    }

}