ref: 10e72d182aad860492f6ec2e80b0c05a4dc20b7a dir: /test/t.split4/
{ a = $0 " " $0 " " $0 " " 123 n = split (a, x, /[ \t][ \t]*/) print n, x[1], x[2], x[3], x[4] }