ID		Error			
CODE	Score	Codes			ERROR CODE LEGEND
					
				[A]	Program requires user to enter a sentinel value to quit [-5]
				[B]	Program accepts (illegal) uppercase versions of legal strings. [-5]
#0246	100			[C]	Program says: LetDigLet, UndDigLet, LetDigUnd, UndDigUnd, 
#0716	99	D			LetDigDig, UndDigDig are not expressions. [-10]
#0977	100			[D]	Program has one or more lines that are wider 
#1137	99	D			than an 80 character display. [-1] (next time [-2])
#1510	100			[E]	Program aborts when LUnd or LeUnd is the input [-5]
#3277	99	D		[F]	Program says strings like LetPop, LetUndPopFoo, 
#3488	81	G,H,I,D			and LetPopUndDigFoo are expressions [-10]
#3776	90	F		[G]	Program does not handle the case of zero input strings properly. [-3]
#3896	80	A,B,C		[H]	Program requires user to alternately enter strings that are "y" or "Y",
#5775	94	D,E			else the program stops. [-5]
#6070	0			[I]	Program says UndDig, UndDigLet, UndDigUnd, UndUndDig, and UndDigDig 
#7055	0				are NOT and expressions.  It says that LetUUnd, LetX, LetXXXXXXX, 
#7477	100				and UndLetXXXXX are expressions. [-10]
#8597	99	D			
#9151	97	G			
#9200	99	D