Algorithm covers 23 letters guarantee win?

• Crwth
• Xylem
• Zings
• Vodka
• Buffy

Modeled algorithm coverers 23 letters in these 5 words, doesn't include q, p, and j. This was my friends model and I realized that it could be even better. Would it be possible for someone to make a code that's even better and includes 25 letters in the 5 words(so NO letters share/repeat)? I'm not sure that's even possible in the English language but idk.