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 PYTHON):

Solution:
def main():
    s = read(read.str)
    m = input()

    # precompute values
    vals = [0]
    for i in xrange(len(s) - 1):
        vals.append(vals[i] + int(s[i] == s[i + 1]))
    
    for _ in xrange(m):
        query = read()
        print vals[query[1] - 1] - vals[query[0] - 1]


### UTILITY FUNCTIONS, END OF CODE ###

import sys

class has_constants(object):
    def __init__(self, *args):
        self.constants = args

    def __call__(self, f):
        for c in self.constants:
            exec('f.{0} = list()'.format(c))
        return f


def debug_print(obj, s='VAR'):
    print '[DEBUG] Value of variable "{0}": {1}'.format(s, obj)

### Credit to chaotic_iak for these next two functions, modified by fz0718 ###
@has_constants('str', 'str_list', 'int_list')
def read(mode=None):
    if mode is None: mode = read.int_list
    inputs = raw_input().strip()
    if mode is read.str: return inputs
    if mode is read.str_list: return inputs.split()
    if mode is read.int_list: return list(map(int, inputs.split()))

def write(s='\n'):
    if s is None: s = ''
    if hasattr(s, '__iter__'): s = ' '.join(str(x) for x in s)
    s = str(s)
    sys.stdout.write(s)

### Running main function ###
if __name__ == '__main__':
    write(main())