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.