Replace some prefixes sex-, tre- and sept- with ses-, tres- and septem-
correspondingly.
It's also possible to replace "sexdecillion" with "sedecillion" and
"novemdecillion" with "novendecillion", but I decided to keep the old
words, since they are in the dictionaries.
See https://en.wikipedia.org/wiki/Names_of_large_numbers.
"tredecillion" "quattuordecillion" "quindecillion"
"sexdecillion" "septendecillion" "octodecillion"
"novemdecillion" "vigintillion" "unvigintillion"
- "duovigintillion" "trevigintillion" "quattuorvigintillion"
- "quinvigintillion" "sexvigintillion" "septvigintillion"
+ "duovigintillion" "tresvigintillion" "quattuorvigintillion"
+ "quinvigintillion" "sesvigintillion" "septemvigintillion"
"octovigintillion" "novemvigintillion" "trigintillion"
"untrigintillion" "duotrigintillion" "trestrigintillion"
"quattuortrigintillion" "quintrigintillion" "sestrigintillion"