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Complete the series: KX, LY, MZ, ?
NA
OA
AN
NZ
Complete the series: 15, 26, 35, 50, ?
64
63
57
65
Complete the series: BCB, DED, FGF, ?
HJH
HIH
IJI
HHI
Complete the series: CDC, EFE, GHG, ?
IKI
IIJ
JKJ
Complete the series: IJI, KLK, MNM, ?
OPO
OQO
OOP
PQP