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 PYTHON3):

Solution:
import math
import re
from fractions import Fraction
from collections import Counter

class Task:
    s = ''
    queries = []
    answer = []
    
    def __init__(self):
        self.s = input()
        self.queries = [[] for _ in range(int(input()))]
        for i in range(len(self.queries)):
            self.queries[i] = [int(x) for x in input().split()]

    def solve(self):
        s, queries = self.s, self.queries
        d = [0] * len(s)
        d[0] = 1 if s[0] == s[1] else 0
        for i in range(1, len(d) - 1):
            d[i] = d[i - 1] + (s[i + 1] == s[i])
        d[-1] = d[-2]

        for current in queries:
            localAnswer = d[current[1] - 2]
            localAnswer -= d[current[0] - 2] if current[0] >= 2 else 0
            self.answer += [localAnswer]

    def printAnswer(self):
        for x in self.answer:
            print(x)

task = Task()
task.solve()
task.printAnswer()