A(2;2;2) B(4;3;3) C(4;5;4) D(5;5;6)
AB=sqrt((4-2)^2+(3-2)^2+(3-2)^2)=sqrt(6), BC=sqrt((4-4)^2+(5-3)^2+(4-3)^2)=sqrt(5), CD=sqrt((5-4)^2+(5-5)^2+(6-4)^2)=sqrt(5), AD=sqrt((5-2)^2+(5-2)^2+(6-2)^2)=sqrt(34).