enne1 := {{u - u^3/3 + u v^2}/2, {-v + v^3/3 - v u^2}/2, {u^2 - v^2}/2}
enne2 := {({u - u^3/3 + u v^2}/2) + \[Pi], {0 + 2*\[Pi]}, {u^2 - v^2}/ 2}
enne3 := {{0 - 2*\[Pi]}, {-v + v^3/3 - v u^2}/2, {u^2 - v^2}/2}
ParametricPlot3D[{enne1, enne2, enne3}, {u, -2, 2}, {v, -2, 2},PlotTheme -> "Classic", PlotPoints -> {20, 20}]
