We grow on the mother bed and use the umbilical cord to extract nutrients. When we are mature, we will be selected and assigned to the sentence. The way to pick is this: a train will drive to the mother bed, picking the letters in order to sit in the train seat, and after the train is taken out of the mother bed, we become a whole sentence.
Only then will we really have life. Everyone is looking forward to being truly alive and being assigned early.