Add punctuation: A stream is a flowing sequence of characters
A: A stream is a flowing sequence of characters.

Add punctuation: big cock 18 big ass tight big tits cumshot ass
A: big cock, 18, big ass, tight, big tits, cumshot, ass

Add punctuation: Spacecraft including satellites and suborbital and spacecraft launch vehicles
A:
Spacecraft (including satellites) and suborbital and spacecraft launch vehicles