#include <iostream>
#include <string>
using namespace std;
int main()
{
	string s;
	int t;
	cin>>t;
	for(int k=1;k<=t;++k)
	{
		cin>>s;
		int ans=0;
		for(int i=0;i<s.size()-1;++i)
			if(s[i]==s[i+1])
				++ans;
		cout<<ans<<endl;
	}
}