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@@P^iP|jP{{^2{EEE

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@@P^iP|j^2P{Q{R^2{EEE

@@iP^iP|jj{^2^Q{^3^R{EEE

@@^iP|j{^2{^3{EEE

@@^n^iP|^nj^n{^2n{^3n{EEE

@@^n^iP|^nji^n{^2n{^3n{EEEj

^kiP|^k+1jiP|^k+2jEEE

iP{^nj^iP|^njE^(n^2)