from collections import Counter,defaultdict,deque

from heapq import heappop,heappush,heapify

import sys,bisect,math,itertools,fractions,pprint

sys.setrecursionlimit(10**8)

mod = 10**9+7

mod2 = 998244353

INF = float('inf')

def inp(): return int(sys.stdin.readline())

def inpl(): return list(map(int, sys.stdin.readline().split()))

def inpln(n): return list(int(sys.stdin.readline()) for i in range(n))



n = inp()

s,t = input().split()

res = ''

for i in range(n):

    res += s[i] + t[i]

print(res)
from collections import Counter,defaultdict,deque

from heapq import heappop,heappush

from bisect import bisect_left,bisect_right 

import sys,math,itertools,fractions

sys.setrecursionlimit(10**8)

mod = 10**9+7

INF = float('inf')

def inp(): return int(sys.stdin.readline())

def inpl(): return list(map(int, sys.stdin.readline().split()))



n = inp()

s,t = input().split()

print((''.join([s[i] + t[i] for i in range(n)])))
from collections import Counter, defaultdict, deque
from heapq import heappop, heappush, heapify
import sys, bisect, math, itertools, fractions, pprint

sys.setrecursionlimit(10**8)
mod = 10**9 + 7
mod2 = 998244353
INF = float("inf")


def inp():
    return int(sys.stdin.readline())


def inpl():
    return list(map(int, sys.stdin.readline().split()))


def inpln(n):
    return list(int(sys.stdin.readline()) for i in range(n))


n = inp()
s, t = input().split()
res = ""
for i in range(n):
    res += s[i] + t[i]
print(res)

from collections import Counter, defaultdict, deque
from heapq import heappop, heappush
from bisect import bisect_left, bisect_right
import sys, math, itertools, fractions

sys.setrecursionlimit(10**8)
mod = 10**9 + 7
INF = float("inf")


def inp():
    return int(sys.stdin.readline())


def inpl():
    return list(map(int, sys.stdin.readline().split()))


n = inp()
s, t = input().split()
print(("".join([s[i] + t[i] for i in range(n)])))

-from heapq import heappop, heappush, heapify -import sys, bisect, math, itertools, fractions, pprint +from heapq import heappop, heappush +from bisect import bisect_left, bisect_right +import sys, math, itertools, fractions -mod2 = 998244353 -def inpln(n): -    return list(int(sys.stdin.readline()) for i in range(n)) - - -res = "" -for i in range(n): -    res += s[i] + t[i] -print(res) +print(("".join([s[i] + t[i] for i in range(n)])))