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:

x = input()
n =int(input())
arr = [0]* n*2
for i in range(0,n*2,2):
    arr[i], arr[i+1] = [int(x) for x in input().split()] 
    
sum = [0]*len(x)
sum[1] = 1 if x[0] ==x[1] else 0
for i in range(1,len(x)-1):
    if(x[i]==x[i+1]):
        sum[i+1] =sum[i] +1
    else:
        sum[i+1] = sum[i]
        
for i in range(0,n*2,2):
    print(sum[arr[i+1]-1]-sum[arr[i]-1])