HappyLadybugs.py

#!/bin/python3

import math
import os
import random
import re
import sys

#
# Complete the 'happyLadybugs' function below.
#
# The function is expected to return a STRING.
# The function accepts STRING b as parameter.
#

def happyLadybugs(b):
    if any(b.count(bug)==1 for bug in b if bug != '_') or ('_' not in b and any(b[i]!=b[i+1] and b[i]!=b[i-1] for i in range(1, n-2))):
        return 'NO'
    else:
        return 'YES'

if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    g = int(input().strip())

    for g_itr in range(g):
        n = int(input().strip())

        b = input()

        result = happyLadybugs(b)

        fptr.write(result + '\n')

    fptr.close()