chess = []
row = 9
col = 9
for i in range(row):
    for j in range (col):
        if (i+j)%2 == 0:
            chess.append(0)
        else:
            chess.append(1)

#for i in range(col):
    #for j in range (row):
print ("%8d",chess,end="")
print ()