a1,6895.854,449.517
a2,6186.659,423.715
a3,5031.439,598.862
a4,5101.541,1050.105
****************
1,2,3,4
****************
a2,a1,1,103.5330
1,a2,2,204.1402
2,1,3,229.0040
3,2,4,224.2612
4,3,a3,153.2956
a3,4,a4,64.0035
***********
a2,1,215.498
1,2,215.723
2,3,495.334
3,4,130.642
4,a3,383.973