OMTNS and SIN.
Of the LEPs that will become LENs, those that have become colored, and those who have formed a group and cooperate with each other, are called OMTNS.
SIN refers to such an organism composed of OMTNS. Whereas LEN is pure life itself by LEP, SIN is classified as a living entity because colored OMTNS are formed by incorporating other substances.
The difference between SIN and LEN is that in the details.
The bigger difference is that LEN doesn’t need our body, it appears in our own way, whereas SIN is trapped in our body. That’s the difference between life and creatures.