maze: 4 0:0 -> 3:3
0,0: d 0.391538986557049
0,1: r 3.14882640637611
0,2: rd 0.0148854629087619,0.019301544005463
0,3: u 15.6415340291405
1,0: dr 0.889878639213553,16.597130417636
1,1: dulr 25.6907194043197,0.577082416767899,11.2788559044107,0.0116108917113176
1,2: url 9.93466159987408,1.26393492879008,0.199913563972552
1,3:  
2,0: dl 18.6496954092342,0.011123208182191
2,1: rlud 0.0687987167581341,0.120311605902415,89.8399554017928,198.151088713489
2,2: uld 12.3336316807166,1.59269860596813,0.680879328533728
2,3: ru 0.0138637250041849,0.216152697975287
3,0:  
3,1: ld 0.0114526228490019,152.662532290366
3,2: u 18.8277117544323
3,3: l 0.0113867473179591