How can I write. a program which do the following:

Write .a Program tail, which prints the last n lines of its input. By default n is 10. let us say; but it can be changed

by an optional argument so that tail -n

Example:

Input:

a

b

c

d

e

f

g

h

i

j

k

l

output:

c

d

e

f

g

h

i

j

k

l