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
input = sys.stdin.readline
ins = lambda: input()
ini = lambda: int(input())
inm = lambda: map(int, input().split())
inl = lambda: list(map(int, input().split()))

s = ins()
n = len(s)
a = [0] * n
m = ini()
for i in range(1, n):
    a[i] = a[i-1] + (1 if s[i] == s[i-1] else 0)
ans = []
for _ in range(m):
    l, r = inm()
    tmp = a[r-1] - a[l-1]
    ans.append(tmp)
print('\n'.join(map(str, ans)))