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())
n = int(sys.stdin.readline().strip())

q = [0] * n
m = [0] * (len(s) - 1)
a = 0

for i in range(n):
    b = sys.stdin.readline().strip().split(' ')
    q[i] = (((int(b[0]) - 1), (int(b[1])) - 1))

for i in range(len(m)):
    if s[i] == s[i + 1]: 
        a += 1
        m[i] = m[i - 1] + 1
    else:
        m[i] = m[i - 1]

for v in q:
    d = v[0] - 1
    if v[0] - 1 < 0:
      print(a - (a - m[v[1] - 1]))
    else:
      print(a - m[d] - (a - m[v[1] - 1]))