Spot the mistake in the picture riddle answer

Spot the mistake in the picture riddle answer 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888 ….
Answer : As marked O(letter ‘O’) is written instead of 0(number zero)
Answer : As marked O(letter ‘O’) is written instead of 0(number zero)