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:
s=input()
t=int(input())

ans=[]
n=len(s)
clue=[0]*n
for i in range(n-1):
    if(s[i]==s[i+1]):
        clue[i]+=1
L=[clue[0]]
for i in range(1,n):
    L.append(L[i-1]+clue[i])

for i in range(t):
    A,B=input().split()
    A=int(A)-1
    B=int(B)-1
    r=0
    x=L[B-1]
    y=L[A-1]
    if(A-1<0):
        y=0
    ans.append(x-y)

for i in range(t):
    print(ans[i])