export type RelationshipType = "Rel_Neighbor" | "Rel_Back_Neighbor" | "Rel_Back" | "Rel_Down" | "Rel_D" | "Rel_Up" | "Rel_U" | "Rel_Left" | "Rel_L" | "Rel_Right" | "Rel_R" | "Rel" | "BiRel_Neighbor" | "BiRel_Down" | "BiRel_D" | "BiRel_Up" | "BiRel_U" | "BiRel_Left" | "BiRel_L" | "BiRel_Right" | "BiRel_R" | "BiRel";