1) CH3-CH2-CH2-CH2-CH2-CH2-CH3
2) CH3 - CH(CH3) - CH2 - CH2 - CH2 - CH3
3) CH3 - CH(CH3) - CH(CH3) - CH2 - CH3
4) CH3 - C(Cl)(CH3) - CH(CH3) - CH3
1) CH3-CH2-CH2-CH2-CH2-CH2-CH3
2) CH3 - CH(CH3) - CH2 - CH2 - CH2 - CH3
3) CH3 - CH(CH3) - CH(CH3) - CH2 - CH3
4) CH3 - C(Cl)(CH3) - CH(CH3) - CH3