InterviewSolution
`[-CH_2-OVERSET(CN)overset(|)C=CH-]_n``[-CH_2-overset(OH)overset(|)C=CH-]_n``[-CH_2=overset(CL)overset(|)C-CH_2-CH_2-]_n``[-CH_2-overset(Cl)overset(|)C=CH-CH_2-]_n`
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