[ ] tri.0000.ss  [ ] tri.0001.ss  [ ] tri.0010.ss  [ ] tri.0011.ss 
[ ] tri.0100.ss  [ ] tri.0101.ss  [ ] tri.0110.ss  [ ] tri.0111.ss 
[ ] tri.0200.ss  [ ] tri.0201.ss  [ ] tri.0210.ss  [ ] tri.0211.ss 
[ ] tri.1000.ss  [ ] tri.1001.ss  [ ] tri.1010.ss  [ ] tri.1011.ss 
[ ] tri.1100.ss  [ ] tri.1101.ss  [ ] tri.1110.ss  [ ] tri.1111.ss 
[ ] tri.1200.ss  [ ] tri.1201.ss  [ ] tri.1210.ss  [ ] tri.1211.ss 
[ ] tri.2000.ss  [ ] tri.2001.ss  [ ] tri.2010.ss  [ ] tri.2011.ss 
[ ] tri.2100.ss  [ ] tri.2101.ss  [ ] tri.2110.ss  [ ] tri.2111.ss 
[ ] tri.2200.ss  [ ] tri.2201.ss  [ ] tri.2210.ss  [ ] tri.2211.ss