10.3 Ordered collections — capstone: sorted word report

Read a count and then that many words. Print, in this order:

• the distinct words as a sorted set, e.g. [apple, fig, pear]
• one line per word — the word, a space, how many times it appeared — in alphabetical order
• the alphabetically first and last word on one line

For 5 then pear apple pear fig apple:

[apple, fig, pear]
apple 2
fig 1
pear 2
apple pear

Use TreeMap and TreeSet: with the Hash versions the order would not be guaranteed and the output would be unpredictable.