N,R,C=list(map(int,input().split()))
if (R+C) %2==0:
for i in range(N):
for j in range(N):
if (i+j) %2 ==0:
print(end="v")
else:
print(end=".")
print()
else:
for i in range(N):
for j in range(N):
if (i+j) %2 ==0:
print(end=".")
else:
print(end="v")
print()