Strange blank characters

Hi,
I am facing strange behaviors with some string manipulations:
I have two string variables <i>hh</i> and <i>mmss</i>.
Content of <i>hh='16'</i> <i>mmss='0000'</i>
Then I call :
<b>CONCATENATE hh mmss INTO hhmmss.</b>
At that point, <i>hhmmss='16 0000'</i>
It should be <i>'160000'</i>. Why such a strange thing ?
I also tried <b>CONCATENATE hh mmss INTO hhmmss SEPARATED BY ''.</b> but I have the same hhmmsss which contains something like a blank character.
<b>CONDENSE hhmmss.</b> cannot remove that character.
(The purpose of this manipulation is to format a date string assigned then to a d type variable).
Any suggestion ?
Sincerely,
Olivier Matt

hi,
<b>CONDENSE lv_string NO-GAPS .</b>
<b>or</b>
lv_char2   type char2,
lv_char2   type char4,
lv_string  type string.
lv_char2 = lv_hh_variable.
lv_char4 = lv_mmss_variable.
concatenate lv_char2 lv_char4 into lv_string.
this will remove strange char form the string.
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