php array program (please give me the codes)?

HI,

i really need this program and am very helpless at the moment since i don't know enough about php.

I need a very simple program where NO FUNCTIONS are used and the program does the following

user enter values such as
1 8 3 8 5 4
it returns

1 3 4 5 6 8

thats all but just can't use functions that is why it is hard. really appreciate the help.
 
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