clear
insert 0 bob
insert 1 joe
insert 0 bob
insert 1 ned
insert 3 zed
print
node 0: bob
node 1: ned
node 2: bob
node 3: zed
node 4: joe
find zed 3
find bob 0
find joe 4
find ned 1
find sue -1
remove 0 bob
print
node 0: ned
node 1: bob
node 2: zed
node 3: joe
find bob 1
remove 1 bob
print
node 0: ned
node 1: zed
node 2: joe
find bob -1
remove 1 zed
remove 1 joe
remove 0 ned
print
find zed -1