import numpy as np

def f(s):
    return [c=='o' for c in s]

lines = np.array([f(input()) for _ in range(3)])

a = [
    [0,0,0,0,1,0,0,0,0],
    [0,0,1,0,0,0,1,0,0],
    [0,0,1,0,1,0,1,0,0],
    [1,0,1,0,0,0,1,0,1],
    [1,0,1,0,1,0,1,0,1],
    [1,1,1,0,0,0,1,1,1],
]

for _ in range(4):
    lines = lines.T
    lines = lines[::-1,:]
    # print(lines)
    for i in range(6):
        if [int(x) for x in list(lines.reshape(-1))] == a[i]:
            print(i+1)
            exit(0)

print("unknown")