Propose an efficient synthesis for the given transformation.

This transformation can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as EBF). If there is more than one correct solution, provide just one answer.

O A B C D E 11 8:2) 1) ;2) Mg ) H30+ H2, Lindlar's cat. NaH H30+ F G . J Na, NH3 (1) HBr (xs), heat 1) MeMgBr; 2) H30+ MCPBA (RCO3H) 1) EtMgBr; 2) H30+ K L M N o dilute H2SO4 DMP or PCC SOCI2, pyridine EtBr 1) BH 3-THF; 2) H202, NaOH