F2. Text Histogram
Problem: Text Histogram
Given: A sequence S of integers in the range 1..9
Produce: A function printing a vertical ASCII histogram showing the count of each number. Vertical bars should indicate the number of occurrences of each number, and should be represented with '*' characters. The digit represented should be immediately below each vertical bar. Empty bars should be rendered.
For example, given [1,2,3,4,5,4,4,3], produce
* ** ***** 123456789