add-city newyork
add-city boston
add-city philadelphia
add-link philadelphia newyork
add-city providence
add-city bangor
place-evader student1 boston
place-evader student2 albany
add-city chicago
add-link providence boston
add-city albany
add-link bangor boston
add-link newyork albany
add-city baltimore
remove-link newyork boston
add-link newyork providence
place-pursuer ta1 baltimore
add-link albany boston
add-city baltimore
add-link newyork boston
add-link philadelphia baltimore
place-pursuer ta2 philadelphia
place-pursuer ta2 baltimore
remove-link boston providence
place-evader student3 bangor
print
tick 1
remove-city newyork
tick 1
tick 1
place-pursuer ta3 chicago
print
tick 1
remove-city chicago
tick 1
remove-city providence
tick 3
print