Update AdjLL.java

input: 
rutgers

output: 
rutgers
kaitlin|y|rutgers
bob|y|rutgers
sam|y|rutgers
aparna|y|rutgers
jane|y|rutgers
kaitlin|y|rutgers
aparna|y|rutgers
jane|y|rutgers
sergei|y|rutgers
aparna|y|rutgers
bob|y|rutgers
jane|y|rutgers

problems:  
missing ricardo
duplicates