Solve the programming task below in a Python markdown code block.
Read problem statements in [Hindi], [Bengali], [Mandarin Chinese], [Russian], and [Vietnamese] as well.

There are $N$ students standing in a row and numbered $1$ through $N$ from left to right. You are given a string $S$ with length $N$, where for each valid $i$, the $i$-th character of $S$ is 'x' if the $i$-th student is a girl or 'y' if this student is a boy. Students standing next to each other in the row are friends.

The students are asked to form pairs for a dance competition. Each pair must consist of a boy and a girl. Two students can only form a pair if they are friends. Each student can only be part of at most one pair. What is the maximum number of pairs that can be formed?

------  Input ------
The first line of the input contains a single integer $T$ denoting the number of test cases. The description of $T$ test cases follows.
The first and only line of each test case contains a single string $S$.

------  Output ------
For each test case, print a single line containing one integer ― the maximum number of pairs.

------  Constraints ------
$1 ≤ T ≤ 100$
$1 ≤ N ≤ 10^{5}$
$|S| = N$
$S$ contains only characters 'x' and 'y'
the sum of $N$ over all test cases does not exceed $3 \cdot 10^{5}$

------  Subtasks ------
Subtask #1 (100 points): original constraints

----- Sample Input 1 ------ 
3

xy

xyxxy

yy
----- Sample Output 1 ------ 
1

2

0
----- explanation 1 ------ 
Example case 1: There is only one possible pair: (first student, second student).

Example case 2: One of the ways to form two pairs is: (first student, second student) and (fourth student, fifth student). 

Another way to form two pairs is: (second student, third student) and (fourth student, fifth student).