String Morphing

Problem Number: 
10 981
Type of Problem: 
Single Output Problem
Problem Category: 
Volume 109 (10,900-10,999)
Input: 
Random Input
0
0
Critical Input: 
Random Input: 
5 baaac a bbbaa b abcaa b aacab c ababc b
Problem Description Link: 
https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=1…
Problem Id: 
10981