SHA2-256(grafmin-user-guide-a4.pdf)= 0b5c2b9af2efe4194ff43580161b3a014a45beca6053d9171c35d7693de7f7b1
SHA2-256(grafmin-user-guide-us.pdf)= 69f74ccfd41da643ca4407760b60e7f1c7a304db53475b259879fb7141bbe844