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.
The tuning of the Portuguese guitar is as follows (from high pitch to low pitch; a means 880 Hz, a' means 440 Hz, a=220, A=110 etc.): When starting from a six-string guitar, we ignore the double strings, and use 2 e' strings, 1 b strings, 2 g strings (or a g and d instead), and 1 A string.