H2c c ch3

H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3
H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3
H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3H2c c ch3