N = int(eval(input()))

S, T = input().split()

ans = [0]*(N*2)

Scount = 0

Tcount = 1

for i in S:

    ans[Scount] = i

    Scount += 2

for j in T:

    ans[Tcount] = j

    Tcount += 2



print((''.join(ans)))

N = int(eval(input()))

S, T = input().split()

S = list(S)

T = list(T)

ans = ""

for i in range(N):

    ans += S[i]

    ans += T[i]

print(ans)

N = int(eval(input()))
S, T = input().split()
ans = [0] * (N * 2)
Scount = 0
Tcount = 1
for i in S:
    ans[Scount] = i
    Scount += 2
for j in T:
    ans[Tcount] = j
    Tcount += 2
print(("".join(ans)))

N = int(eval(input()))
S, T = input().split()
S = list(S)
T = list(T)
ans = ""
for i in range(N):
    ans += S[i]
    ans += T[i]
print(ans)

-ans = [0] * (N * 2) -Scount = 0 -Tcount = 1 -for i in S: -    ans[Scount] = i -    Scount += 2 -for j in T: -    ans[Tcount] = j -    Tcount += 2 -print(("".join(ans))) +S = list(S) +T = list(T) +ans = "" +for i in range(N): +    ans += S[i] +    ans += T[i] +print(ans)