simulate00: simulate empty input
Train green entering Greenbelt
Train blue entering Largo Town Center
Train orange entering New Carrolton
Train yellow entering Fort Totten
Train red entering Glenmont
Train blue leaving Largo Town Center
Train orange leaving New Carrolton
Train yellow leaving Fort Totten
Train green leaving Greenbelt
Train red leaving Glenmont
Train blue entering Stadium-Armory
Train yellow entering Gallery Place
Train green entering College Park
Alice boarding train green at College Park
Train red entering Silver Spring
Train blue leaving Stadium-Armory
Train orange entering Stadium-Armory
Train yellow leaving Gallery Place
Train blue entering Eastern Market
Train green leaving College Park
Train red leaving Silver Spring
Train yellow entering L'Enfant Plaza
Train green entering Fort Totten
Train blue leaving Eastern Market
Train orange leaving Stadium-Armory
Train yellow leaving L'Enfant Plaza
Train blue entering L'Enfant Plaza
Train orange entering Eastern Market
Train yellow entering Pentagon
Train green leaving Fort Totten
Train red entering Fort Totten
Train green entering Gallery Place
Alice leaving train green at Gallery Place