Where's Sneezy?

And if we order the Hydrogen nuclei written down so far by their masses,

($T^+$, $p^+$)

($p^+$)

($g^+$, $T^+$, $p^+$)

($T^+$, $p^+$, $g^+$)  and  ($T^+$, $p^+$, $g^+$, $T^+$)

($p^+$, $g^+$)  and  ($p^+$, $g^+$, $T^+$)

($g^+$, $T^+$, $p^+$, $g^+$)  and  ($g^+$, $T^+$, $p^+$, $g^+$, $T^{+}$)

keeping in mind that given equal number of $g^{+}$ particles, the lower position of $p^{+}$ in the set increases mass, and assuming that the addition of a $T^{+}$ particle does not change mass.

Here, we are one short of the seven discovered Hydrogen isotopes.  Where's the last?

Note: Cyclic permutation, the particles are added in specific order.  No swapping of position nor adding other types of particle please.