clear
add bale
print
level 0: bale(1)
add tuft
print
level 0: bale(2)
level 1: tuft(1)
add done
print
level 0: done(2)
level 1: bale(1) tuft(1)
add toga
print
level 0: done(3)
level 1: bale(1) tuft(2)
level 2: toga(1)
add toad
print
level 0: done(3)
level 1: bale(1) toga(2)
level 2: toad(1) tuft(1)
add slot
print
level 0: toad(3)
level 1: done(2) toga(2)
level 2: bale(1) slot(1) tuft(1)
add road
print
level 0: toad(4)
level 1: done(3) toga(2)
level 2: bale(1) slot(2) tuft(1)
level 3: road(1)
add lush
print
level 0: toad(4)
level 1: done(3) toga(2)
level 2: bale(1) road(2) tuft(1)
level 3: lush(1) slot(1)
add gate
print
level 0: toad(4)
level 1: lush(3) toga(2)
level 2: done(2) road(2) tuft(1)
level 3: bale(1) gate(1) slot(1)
add feud
print
level 0: lush(4)
level 1: done(3) toad(3)
level 2: bale(1) gate(2) road(2) toga(2)
level 3: feud(1) slot(1) tuft(1)
remove tuft
print
level 0: lush(4)
level 1: done(3) toad(3)
level 2: bale(1) gate(2) road(2) toga(1)
level 3: feud(1) slot(1)
remove bale
print
level 0: lush(4)
level 1: feud(2) toad(3)
level 2: done(1) gate(1) road(2) toga(1)
level 3: slot(1)
remove toga
print
level 0: lush(3)
level 1: feud(2) slot(2)
level 2: done(1) gate(1) road(1) toad(1)
remove toad
print
level 0: lush(3)
level 1: feud(2) slot(2)
level 2: done(1) gate(1) road(1)
remove done
print
level 0: lush(3)
level 1: feud(2) slot(2)
level 2: gate(1) road(1)
remove feud
print
level 0: lush(3)
level 1: gate(1) slot(2)
level 2: road(1)
remove gate
print
level 0: road(2)
level 1: lush(1) slot(1)
remove slot
print
level 0: road(2)
level 1: lush(1)
remove lush
print
level 0: road(1)
remove road
print