Tautology

Problem Number: 
11 108
Type of Problem: 
Single Output Problem
Problem Category: 
Volume 111 (11,100-11,199)
Input: 
Random Input
0
0
Critical Input: 
Random Input: 
p q r s ApNp ApNq ApNNNp ANNpNNNp EKCpqCqpEpq EpNNp EpNNNp ENpNNNp NKpNp CpCqp 0
Problem Description Link: 
https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=1…
Problem Id: 
11108