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 sys
s = list(sys.stdin.readline().strip())
numberOfQueries = int(sys.stdin.readline().strip())
queries = [0] * numberOfQueries
for i in range(numberOfQueries):
  a = input().split(' ')
  queries[i] = (int(a[0])), (int(a[1]))
ans = 0
length = len(s) 
arr = []



def same(s): 
  sums = 0
  count = 0
  for x in s:
    if count == 0:
      compare = x
      count += 1
    else:
      if compare == x:
        arr.append(1+sums)
        sums += 1
        compare = x
      else:
        arr.append(sums)
        compare = x

def find(length, array):
  start = array[0]-2
  end = array[1]-2
  if start == -1:
    ans = arr[end]
  else:
    ans = arr[end] - arr[start]
  print(ans)

same(s)
for x in range(numberOfQueries):
  find(length, queries[x])