count = 0
a = []
for i in range(3):
    inp = input()
    a.append(inp)
    for j in range(3):
        if inp[j] == 'o':
            count += 1

if count == 1:
    if a[0] == ':::' and a[1] == ':o:' and a[2] == ':::':
        print('1')
    else:
        print('unknown')
elif count == 2:
    if (a[0] == '::o' and a[1] == ':::' and a[2] == 'o::') or (a[0] == 'o::' and a[1] == ':::' and a[2] == '::o'):
        print('2')
    else:
        print('unknown')
elif count == 3:
    if (a[0] == '::o' and a[1] == ':o:' and a[2] == 'o::') or (a[0] == 'o::' and a[1] == ':o:' and a[2] == '::o'):
        print('3')
    else:
        print('unknown')
elif count == 4:
    if a[0] == 'o:o' and a[1] == ':::' and a[2] == 'o:o':
        print('4')
    else:
        print('unknown')
elif count == 5:
    if a[0] == 'o:o' and a[1] == ':o:' and a[2] == 'o:o':
        print('5')
    else:
        print('unknown')
elif count == 6:
    if (a[0] == 'o:o' and a[1] == 'o:o' and a[2] == 'o:o') or (a[0] == 'ooo' and a[1] == ':::' and a[2] == 'ooo'):
        print('6')
    else:
        print('unknown')
else:
    print('unknown')