C

39 y2 RB'R'U'RUBU'R'

43 B'U'R'URB

44 need y2 before 2nd alg

47 b'U'R'URU'R'URb

49 y2 R'FR'F'R2d2 y' R'FRF'

50 RB'RBR2'U2 FR'F'R

56 FRUR'U'RF'rUR'U'r'

43 B'U'R'URB

44 need y2 before 2nd alg

47 b'U'R'URU'R'URb

49 y2 R'FR'F'R2d2 y' R'FRF'

50 RB'RBR2'U2 FR'F'R

56 FRUR'U'RF'rUR'U'r'