2 lines
158 B
Plaintext
2 lines
158 B
Plaintext
πname,phone(((πname,id(people)- π name,id(πid(σ i!=id and room==r(ρ id➡i,room➡r(person_room)*person_room)) ⋈ people)) ⋈ person_room) ⋈ rooms)
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