Output of two files One After Another

Hi Can we put output of two files one after another?
For example i have two files.

File1.txt ---

CDTBIPX      UNIX      6624
CDTBIPX      UNIX      6625
CDTBIPX      UNIX      6626
CDTBIPX      UNIX      6627

File2.txt

20090928 11:30:01 6624 0
20090928 12:00:01 6625 0
20090928 12:30:00 6626 0
20090928 13:00:01 6627 0

Now i want then to arrange in one line like

CDTBIPX      UNIX      6624    20090928 11:30:01 6624 0
CDTBIPX      UNIX      6625    20090928 12:00:01 6625 0
CDTBIPX      UNIX      6626    20090928 12:30:00 6626 0
....

AND

UNIX      6624   11:30:01    CDTBIPX      
UNIX      6625   12:00:01    CDTBIPX      
UNIX      6626   12:30:00    CDTBIPX      

Can you please help

look into 'man paste'

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please find the commands

1st output - paste File1.txt File2.txt
2nd outupt - paste File1.txt File2.txt|awk '{print $2,$3,$5,$1}'

thnaks dear, this was really helpful.