ref: 3206ebbc2fbd2d489d12a559b5d4e68fdfdc5ffc 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] }