Advent of Code Day 3 part 2 find Oxygen method

oxygen.rb

def find_oxygen(data)
  input = data.clone
  bits = input[0].length

  for i in 0..bits - 1
    ones = input.count { |n| n[i] == "1" }
    zeros = input.count { |n| n[i] == "0" }

    most_common = ones > zeros ? "1" : "0"
    most_common = "1" if ones == zeros
    oxygen = input.delete_if {|binary| binary[i] != most_common}.first
    break if input.count == 1
  end
  oxygen.to_i(2)
end