tvh 2 'A' 'B' 'C' == [('A','C'),('A','B'),('C','B')]
tvh (-2) 'A' 'B' 'C' == []

erreichbarVon [[0,1,1,0],[1,0,0,1],[0,0,1,0],[0,0,0,0]] 2 == [4,3,2,1]
erreichbarVon [[0,1,1,0],[1,0,0,1],[0,0,1,0],[0,0,0,0]] 3 == [3]

istErreichbar [[0,1,1,0],[1,0,0,1],[0,0,1,0],[0,0,0,0]] 2 3 2 == True
istErreichbar [[0,1,1,0],[1,0,0,1],[0,0,1,0],[0,0,0,0]] 2 3 1 == False

allMaxPals "Ottos Lebensmotto" == ["otto"]
allMaxPals "Ottos Lebensdrama" == ["ebe","ama"]