import sys

def find_sum_row(buf):
    sum_row = [0, 0, 0]
    for i in range(len(buf)):
        row = buf[i].split()
        for m in row:
            sum_row[i] += int(m)
    return sum_row

        
def find_sum_col(buf):
    sum_col = [0, 0, 0]
    for i in range(len(buf)):
        for j in range(len(buf)):
            sum_col[i] += int(buf[j].split()[i])
    for i in range(len(sum_col)):
        if sum_col[i] != 15:
            return i
        
buf = []
while True:
    line = sys.stdin.readline().strip('\n')
    if line:
        buf.append(line)
    else:
        break

if buf:
    sum_row = find_sum_row(buf)
    for i in range(len(sum_row)):
        if sum_row[i] != 15:
            row = i
            diff = 15 - sum_row[i]
    col = find_sum_col(buf)
    print(diff)