In a chapter 13 case, to participate in distributions from the bankruptcy estate, unsecured creditors must file their claims with the court within 90 days after the first date set for the meeting of creditors. Fed. R. Bankr. P. 3002(c).
They may have nylon or steel strings. The strings of a six-string guitar are tuned to E, A, D, G, B, E, a fourth apart except for the major third interval between B and G. Frets are placed by the fret rule one-eighteenth the remaining length of the string. This makes them a semitone apart.
A seven string guitar might have longer scale length to accommodate lower tunings. A six stringed guitar can usually be made to handle B tuning, but there might be intonation issues, especially with Gibson measure, which is 24.75. If one wants to go lower, a longer scale is preferred. That can be another benefit with a seven string guitar. Seven string guitars have different scale lengths, some are normal scale with just an added string. For low tunings with six strings you can look at a baritone guitar. A lot of the modern metal material is performed with a seven string, if you want to play those songs it might be hard with a six string.