Use of uninitialized value in print at checking.pl line 71, <DATA> line 338.
M61:    M61<-M7<-M28<-M6<-Q = E.P.E.E,
Use of uninitialized value in print at checking.pl line 71, <DATA> line 338.
M196:   M196<-M53<-M7<-M28<-M6<-Q = E.P.E.Pl.E,