cc	first	second	third	last
a	1	20	2	21
b	2	19	4	27
c	3	18	6	23
d	4	17	8	24
e	5	16	10	21
f	6	15	12	26
g	7	14	14	25
h	8	13	16	29
i	9	12	18	24
j	10	11	20	29
k	11	10	22	23
l	12	9	24	22
m	13	8	26	29
n	14	7	28	24
o	15	6	30	28
p	16	5	32	26
q	17	4	34	27
r	18	3	36	25
s	19	2	38	21
t	20	1	40	29