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try this
if [ "$A" -eq "y" || "$A" -eq "Y" ]
and check spaces

awk '{print $1,$2}' file

I think this also works

awk 'BEGIN {big=$1} {if($1>big) big=$1} END {print big}' input_file

you can use this code to find the biggest number. and here $1 means first field i,e here we are having only one column.