import sys

N = int(input())

S,T = input().split()



if not ( 1 <= N <= 100 ): sys.exit()

if not ( len(S) == len(T) and len(S) == N ): sys.exit()

if not ( S.islower() and T.islower() ): sys.exit()



for I in range(N):

    print(S[I],end='')

    print(T[I],end='')

# import sys

N = int(input())

S,T = input().split()



# if not ( 1 <= N <= 100 ): sys.exit()

# if not ( len(S) == len(T) and len(S) == N ): sys.exit()

# if not ( S.islower() and T.islower() ): sys.exit()



for I in range(N):

    print(S[I],end='')

    print(T[I],end='')

import sys

N = int(input())
S, T = input().split()
if not (1 <= N <= 100):
    sys.exit()
if not (len(S) == len(T) and len(S) == N):
    sys.exit()
if not (S.islower() and T.islower()):
    sys.exit()
for I in range(N):
    print(S[I], end="")
    print(T[I], end="")

# import sys
N = int(input())
S, T = input().split()
# if not ( 1 <= N <= 100 ): sys.exit()
# if not ( len(S) == len(T) and len(S) == N ): sys.exit()
# if not ( S.islower() and T.islower() ): sys.exit()
for I in range(N):
    print(S[I], end="")
    print(T[I], end="")

-import sys - +# import sys -if not (1 <= N <= 100): -    sys.exit() -if not (len(S) == len(T) and len(S) == N): -    sys.exit() -if not (S.islower() and T.islower()): -    sys.exit() +# if not ( 1 <= N <= 100 ): sys.exit() +# if not ( len(S) == len(T) and len(S) == N ): sys.exit() +# if not ( S.islower() and T.islower() ): sys.exit()