File list (Check if you may need any files):
lesson1
.......\1_1.c
.......\1_1.LST
.......\1_1.OBJ
.......\1_10.c
.......\1_10.LST
.......\1_10.OBJ
.......\1_2.c
.......\1_2.LST
.......\1_2.OBJ
.......\1_3.c
.......\1_3.LST
.......\1_3.OBJ
.......\1_4.c
.......\1_5.c
.......\1_5.LST
.......\1_5.OBJ
.......\1_6.c
.......\1_7.c
.......\1_7.LST
.......\1_7.OBJ
.......\1_8.c
.......\1_9.c
.......\1_9.LST
.......\1_9.OBJ
.......\2_1.lst
.......\2_1.obj
.......\2_2.lst
.......\2_2.obj
.......\2_3.lst
.......\2_3.obj
.......\2_4.lst
.......\2_4.obj
.......\2_5.lst
.......\2_5.obj
.......\2_6.lst
.......\2_6.obj
.......\2_7.lst
.......\2_7.obj
.......\3_1.lst
.......\3_1.obj
.......\3_2.lst
.......\3_2.obj
.......\3_3.lst
.......\3_3.obj
.......\3_4.lst
.......\3_4.obj
.......\4_1.lst
.......\4_1.obj
.......\4_2.lst
.......\4_2.obj
.......\4_3.lst
.......\4_3.obj
.......\lesson1
.......\lesson1.hex
.......\lesson1.LIB
.......\lesson1.lnp
.......\lesson1.M51
.......\lesson1.Opt
.......\lesson1.plg
.......\lesson1.Uv2
.......\lesson1_Opt.Bak
.......\lesson1_Uv2.Bak
lesson2
.......\2_1.c
.......\2_2.c
.......\2_3.c
.......\2_4.c
.......\2_5.c
.......\2_6.c
.......\2_7.c
lesson3
.......\3_1.c
.......\3_2.c
.......\3_3.c
.......\3_4.c
lesson4
.......\4_1.c
.......\4_2.c
.......\4_3.c