a = [['a', 'a', 'b'], ['o', 'o', 'o'], ['a', 'b', 'b'], ['a', 'a', 'b']]

for i in range(len(a)):
    for j in range(len(a[i])):

        print(a[i][j], end = ' ')
    print()


s = ('o', 'a', 'i')

k = 0
ma = 0
c = 0
for i in range(3):
    for j in range(4):
        if a[j][i] in s:
            k += 1


        else:
            if k > ma:
                ma = k
                c = i
            k = 0
    if k > ma:
        ma = k
        c = i
    k = 0



for i in range(len(a)):
    for j in range(len(a[i])):
        if j == c:
           a[i].remove(a[i][j])




print('\n\n')
for i in range(len(a)):
    for j in range(len(a[i])):
        print(a[i][j], end = ' ')
    print()




'''
for i in range(len(a)):
    print(a[i])

for i in range(len(a)):
    for j in range(len(a[i])):
        if j == c:
           a[i].pop(j)


print(a)

print(ma, c)

print('\n\n')
for i in range(len(a)):
    for j in range(len(a[i])):
        print(a[i][j], end = ' ')
    print()
 '''