#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Mon Dec  2 04:47:07 2019

"""

#ary = ['aa','bb','cc']

#s = ""


def Join(array, sep=" "):
    s = ""
    l = len(array)
    for i in range(l):
        s = s+array[i]
        if(i<l):
            s = s+sep
    return s 

#print(Join(ary, '!'))
#print(Join(ary))