Not unrelated because sx first is the countertype in some enneagram types thus rarer; sx 6 and sx 1
IEI
EIE
SLE
LSI
SLI
EII
LSE
IEE
ILE
SEI
LII
ESE
SEE
ILI
LIE
ESI
Not unrelated because sx first is the countertype in some enneagram types thus rarer; sx 6 and sx 1