This corresponds to $FDAB in the ZX Spectrum version.

Used by little boy no. 1, little boy no. 2 and little boy no. 3 in lesson $F9; by little boy no. 4 in lesson $FE; by little boy no. 5 in lesson $F8; by little boy no. 6 in lessons $F7, $FA and $FF; by little boy no. 7 in lessons $F6 and $FA; by little boy no. 8 in lessons $F6, $F8 and $FE; by little boy no. 9 in lesson $F6; by little boy no. 10 in lesson $FF; by little boy no. 11 in lesson $F7; and by MR WITHIT in lesson $E4.