Problem: Ilya the Lion wants to help all his friends with passing exams. They need to solve the following problem to pass the IT exam.

You've got string s = s1s2... sn (n is the length of the string), consisting only of characters "." and "#" and m queries. Each query is described by a pair of integers li, ri (1 ≤ li < ri ≤ n). The answer to the query li, ri is the number of such integers i (li ≤ i < ri), that si = si + 1.

Ilya the Lion wants to help his friends but is there anyone to help him? Help Ilya, solve the problem.

Input

The first line contains string s of length n (2 ≤ n ≤ 105). It is guaranteed that the given string only consists of characters "." and "#".

The next line contains integer m (1 ≤ m ≤ 105) — the number of queries. Each of the next m lines contains the description of the corresponding query. The i-th line contains integers li, ri (1 ≤ li < ri ≤ n).

Output

Print m integers — the answers to the queries in the order in which they are given in the input.

Examples

Input

......
4
3 4
2 3
1 6
2 6


Output

1
1
5
4


Input

#..###
5
1 3
5 6
1 5
3 6
3 4


Output

1
1
2
2
0

Solution (in PYTHON):

Solution:
#!/usr/bin/python
from __future__ import division
from sys import stdin, stdout, maxint

ln = stdin.readline ().strip ('\n\r')
arr = [0] * (len (ln) + 1)

for n in xrange (0, len (ln)):
	arr[n + 1] = arr[n]
	
	if ln[n] == ln[n - 1]:
		arr[n + 1] += 1

M = int (stdin.readline ())

for m in xrange (M):
	l, r = map (int, stdin.readline ().split ())
	print arr[r] - arr[l]