column	letters	mean-min	mean-middle	mean-max	median-min	median-middle	median-max
1	2	1	1	1	0.9	0.9	0.9
2	2	5	5	6	4.5	4.5	5.5
4	2	7	7	8	6.5	6.5	7.5
5	3	2	2	2	1.8	1.9	2
