c, 1c4, 1c4, 2c4, 3c4, 4c4, 5c5, 1c8, 1c9, 1c9, 2c9, 3c9, 4c13, 1c13, 2c14, 1c14, 2c18, 1c18, 2c18, 3c18, 4