import sys
input = sys.stdin.readline
H, W = map(int, input().split())
ans = [["" for _ in range(W)] for _ in range(H)]
for i in range(0, H, 2):
    ii = i//2
    for j in range(W):
        ans[i][j] = "o" if (ii+j)%2==0 else "x"
        if i+1<H:
            ans[i+1][j] = "o" if (ii+j)%2==0 else "x"
for a in ans:
    print("".join(a))