typeof(x[0]) is untyped
typeof(x[1]) is unassigned
typeof(x[0]) is array
typeof(x[0][1]) is string
typeof(y) is untyped
typeof(y) is unassigned
typeof(z) is unassigned
gawk: mdim1.awk:13: fatal: attempt to use scalar `x["1"]' as an array
EXIT CODE: 2