Sindbad~EG File Manager

Length of proof is 5.  Level of proof is 2.
 
---------------- PROOF ----------------
 
87 [] xa=xp|sameside(xa,xp,xa).
248 [] -congruent(xa,xb,xc,xd,xe,xf)| -sameside(xa2,xb,xa)| -sameside(xc2,xb,xc)| -sameside(xd2,xe,xd)| -sameside(xf2,xe,xf)| -E(xb,xa2,xe,xd2)| -E(xb,xc2,xe,xf2)|E(xa2,xc2,xd2,xf2).
333 [] -congruent(xa,xb,xc,xd,xe,xf)|xa!=xb.
334 [] -congruent(xa,xb,xc,xd,xe,xf)|xc!=xb.
335 [] -congruent(xa,xb,xc,xd,xe,xf)|xd!=xe.
336 [] -congruent(xa,xb,xc,xd,xe,xf)|xf!=xe.
339 [] congruent(a,b,c,a1,b1,c1).
340 [] E(b,a,b1,a1).
341 [] E(b,c,b1,c1).
342 [] -E(a,c,a1,c1).
359 [hyper,336,339,87] sameside(c1,b1,c1).
362 [hyper,335,339,87] sameside(a1,b1,a1).
365 [hyper,334,339,87] sameside(c,b,c).
368 [hyper,333,339,87] sameside(a,b,a).
462 [ur,248,339,365,362,359,340,341,342] -sameside(a,b,a).
463 [binary,462.1,368.1] $F.