You need to find in the line: whether this line includes in the line or not. For example, there is a string sdfssf sddff svvsef XBSDF SDFWWWWW you need to find out if it is included in it dfff or not.
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01.01.1970 03:00
Search for tuning in a line
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01.01.1970 03:00
if "" SDFSSF SDDFF SVVVSEF XBSDF SDFWWWWW "" : print