use std const main = {        var seed : uint32 = 0xe96d7f9c /* (std.now() : uint32) */        std.put("seed = 0x{x}\n", seed)         var r : std.rng# = std.mksrng(seed)         var m : byte[:][:][:] = std.slalloc(std.rngrand(r, 1, 20))        for var j = 0; j < m.len; ++j                m[j] = [][:]        ;;         var s : byte[:][:] = std.slalloc(std.rngrand(r, 1, 20))        for var j = 0; j < s.len; ++j                s[j] = std.slalloc(std.rngrand(r, 2, 34))                std.slfill(s[j], ('_' : byte))        ;; 	for var i = 0; i < 10_000; i++                if std.rngrand(r, 0, 2) == 0                        var j = std.rngrand(r, 0, m.len)                        var k = std.rngrand(r, 0, s.len)                         var num_s = std.rngrand(r, 50, 100)                        for var l = 0; l < num_s; ++l                                std.slpush(&m[j], std.sldup(s[k]))                        ;;                else                        var j = std.rngrand(r, 0, m.len)                        for q : m[j]                                std.slfree(q)                        ;;                        std.slfree(m[j])                        m[j] = [][:]                ;;        ;;}