Problem:
Score : 500 points

Problem Statement

Takahashi has decided to work on K days of his choice from the N days starting with tomorrow.

You are given an integer C and a string S. Takahashi will choose his workdays as follows:

After working for a day, he will refrain from working on the subsequent C days.

If the i-th character of S is x, he will not work on Day i, where Day 1 is tomorrow, Day 2 is the day after tomorrow, and so on.

Find all days on which Takahashi is bound to work.

Constraints

1 \leq N \leq 2 \times 10^5

1 \leq K \leq N

0 \leq C \leq N

The length of S is N.

Each character of S is o or x.

Takahashi can choose his workdays so that the conditions in Problem Statement are satisfied.

Input

Input is given from Standard Input in the following format:

N K C
S

Output

Print all days on which Takahashi is bound to work in ascending order, one per line.

Sample Input 1

11 3 2
ooxxxoxxxoo

Sample Output 1

6

Takahashi is going to work on 3 days out of the 11 days. After working for a day, he will refrain from working on the subsequent 2 days.

There are four possible choices for his workdays: Day 1,6,10, Day 1,6,11, Day 2,6,10, and Day 2,6,11.

Thus, he is bound to work on Day 6.

Sample Input 2

5 2 3
ooxoo

Sample Output 2

1
5

There is only one possible choice for his workdays: Day 1,5.

Sample Input 3

5 1 0
ooooo

Sample Output 3

There may be no days on which he is bound to work.

Sample Input 4

16 4 3
ooxxoxoxxxoxoxxo

Sample Output 4

11
16

Solution in PyPy3 (2.4.0) (judge verdict: Wrong Answer)

import itertools


def main():
    n, k, c = [int(x) for x in input().split()]
    s = input()
    can_work = []
    for i, ch in enumerate(s):
        if ch == 'o':
            can_work.append(i)

    if c == 0:
        return

    comb = itertools.combinations(can_work, k)
    appropriate = []
    appropriate_add = appropriate.append
    for v in comb:
        for i, j in enumerate(v[:-1]):
            if v[i + 1] - j <= c:
                break
        else:
            appropriate_add(set(v))
    ans = appropriate[0]
    for ss in appropriate[1:]:
        ans = ans & ss
        # Don't forget +1

    ans = list(ans)
    ans.sort()
    for day in ans:
        print(day + 1)


if __name__ == '__main__':
    main()