a1 = { 0, 3, 100, 0, 0 }
a2 = { 10, 0, -2, -1, -3 }
a3 = { 1, 2, 5, 6, 7 } (size = 5)
s1 = { 0, 0.00, abc }
s2 = { 13, 4.50, xxx }
s3 = { 0, 0.00, abc }
u1.c = abc
u2.a = 15
u3.b = 3.14
u4.c = {0,0,1,0}
pv1 = { {1,2,3}, {11,12,13}, {0,0,0}, {0,3,0}, }
t = { {0,42,43}, {{1,0,0}, {0,1,0}, {0,0,1}, } }