SHA2-256(grafmin-user-guide-a4.pdf)= b91372e01d71014d275a8720c223dbecfef7e0e107f8b09d3f07146c1cadc9eb
SHA2-256(grafmin-user-guide-us.pdf)= b7c5ac043b310cd458d00334fe017e84a060a575a8cc5025d09cbc50e15fe3cb