clear
insert 0 bob
insert 1 joe
insert 0 jim
insert 1 ned
insert 3 zed
print
node 0: jim
node 1: ned
node 2: bob
node 3: zed
node 4: joe
remove 0 jim
print
node 0: ned
node 1: bob
node 2: zed
node 3: joe
remove 3 joe
print
node 0: ned
node 1: bob
node 2: zed
remove 1 bob
print
node 0: ned
node 1: zed
remove 1 zed
print
node 0: ned
remove 0 ned
print