U52ttNU64ttsplusNMU11ttU12isNatKindU12ttU13isNatKindU13ttU14isNatKindU14ttU15isNatU15ttU16isNatU16ttttU21ttU22isNatKindU22ttU23isNatU23ttttU31ttU32isNatKindU32ttttU41ttttU51ttU52isNatKindU61ttU62isNatKindU62ttU63isNatU63ttU64isNatKindisNatttisNatU11isNatKindisNatU21isNatKindisNatKindttisNatKindU31isNatKindisNatKindU41isNatKindplusN0U51isNatplusNsMU61isNat