Gramatica

CODE -> INSTRUCTION*

INSTRUCTIONS -> FOR
				IF
				WHILE
				INPUT
				ASSIGN
				PRINT
				pass

FOR -> for VAR in range(VARB, VARB): TAB

IF -> if BOOL TAB
	  if BOOL TAB else: TAB

BOOL -> EXPRESSION {B_OP EXPRESSION}* :

TAB -> tab INSTRUCCTIONS* untab

WHILE -> BOOL TABW

TABW -> tab INSTRUCTIONS* pass untab

INPUT -> VAR = ("string")

ASSIGN -> VAR = VARB
		  VAR = INPUT
		  VAR = [VARB {, VARB}* ]

PRINT -> print(PRT {,prt}* )

VAR- > ID
	   ID[VARB]

VARB -> EXPRESSION
		LEN
		VAR[VARB]

PRT -> string
	   Input
	   VARB

LEN -> len(VAR)

EXPRESSION -> F[(+||-)F]*

F -> M[(x||/)F]*

M -> L[(%||**)M]*

L-> ID
	INT
	(EXPRESSION)