Assumesis a string of lower case characters. Write a program that prints the longest substring ofsin which the letters occur in alphabetical order. For example, ifs = 'azcbobobegghakl', then your...

Assumesis a string of lower case characters.

Write a program that prints the longest substring ofsin which the letters occur in alphabetical order. For example, ifs = 'azcbobobegghakl', then your program should print

Longest substring in alphabetical order is: beggh

In the case of ties, print the first substring. For example, ifs = 'abcbcd', then your program should print

Longest substring in alphabetical order is: abc