C= conventions, right opening/closing phrases (Dear name, / Hi name, Greetings/Greatings, name)
G1 = grammar 1 (big mistakes, "tenses", word order)
G2 = grammar 2 (smaller mistakes like prepositions (voorzetsels), their/ they're, pronouns I, he, she, it etc., Im, cant, dont)
SP = spelling, punctuation and capital letters.