Below is the contents of mesh.ply.
ply format ascii 1.0 element vertex 20 property float x property float y property float z property float nx property float ny property float nz element face 24 property list uchar int vertex_indices end_header 0 1.9233e-09 -0.022 0.0968684 0.0421761 0.994403 0.1 2.55712e-09 -0.02925 0.0813823 0.0116243 0.996615 0.2 3.23464e-09 -0.037 0.183388 0.00324481 0.983035 0.3 5.39836e-09 -0.06175 0.0130361 0.00999858 0.999865 0.4 3.47506e-09 -0.03975 -0.260621 0.0582479 0.963682 0 -0.1 -0.01525 0.0670163 0.0337915 0.99718 0.1 -0.1 -0.0275 0.106202 0.0598358 0.992543 0.2 -0.1 -0.037 0.166457 0.0257921 0.985711 0.3 -0.1 -0.06075 -0.0394437 0.00283849 0.999218 0.4 -0.1 -0.0285 -0.306872 -0.0198981 0.951543 0 -0.2 -0.02175 -0.0449005 -0.0490515 0.997787 0.1 -0.2 -0.0175 0.0519783 0.0245596 0.998346 0.2 -0.2 -0.031 0.198977 0.0745521 0.977164 0.3 -0.2 -0.05875 0.0965888 0.0426582 0.99441 0.4 -0.2 -0.044 -0.159401 -0.0306774 0.986737 0 -0.3 -0.02625 -0.0498873 -0.0448986 0.997745 0.1 -0.3 -0.02125 -0.0282842 -0.0399503 0.998801 0.2 -0.3 -0.022 0.146558 0.0460812 0.988128 0.3 -0.3 -0.053 0.0966444 0.0370802 0.994628 0.4 -0.3 -0.04925 -0.0374222 -0.0523912 0.997925 3 0 5 6 3 0 6 1 3 1 6 7 3 1 7 2 3 2 7 8 3 2 8 3 3 8 9 4 3 8 4 3 3 5 10 11 3 5 11 6 3 6 11 12 3 6 12 7 3 7 12 13 3 7 13 8 3 8 13 14 3 8 14 9 3 10 15 16 3 10 16 11 3 11 16 17 3 11 17 12 3 12 17 18 3 12 18 13 3 18 19 14 3 18 14 13