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9871265346541 (8)
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(1)
HCH3
H3CHCl(2)
CH3HCH3CH3HCl
CHH3ClH
ClCl(3)
CH3CH3HHClClH3CClH
CH3 H3CHCl
H3CCH3(4)
HCH3BrHBr
HHCH3
BrBrCH3(5)
BrHCHBr3HHBrH
BrCH3
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H(1)
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CH3CH3HCH3Cl
CH3HHHHCCl(CH3)2CH3(4)
H3CCH3CH3ClCH3HCH3 (5)
CH3H (6)
CH3Cl
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(A)
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CH3
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H(E)
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