Keep only numbers from the list

sachin

From this sample list of data i want to exract numbers only using sed in linux

9898922479
'19897774506'
9896460144

"9896300029"
98924645271

9858392130
9852150122
ss
9802108399sac
9802088710txt
ss

Into output like this format

sachin

You may have to pass through few validation rules

#replace LF; with CR;LF; Carriage Return (Line Feed / CRLF)
unix2dos file.txt

#create new line at the end if missing
echo \ >> file.txt

#this will remove all the single and double quotes
sed -i 's/[\"'\''\ ]//g' file.txt

#this will remove all lines which do not match criteria (number starting with 1 and of 11 digits or 10 digit number not starting with 1)
sed -i -E '/^1?[^1][0-9]{9}\s$/!d' file.txt

#any spaces, tabs in lines
sed -i '/^[[:space:]]*$/d' file.txt

#replacing 1 in first postion with blank
sed -i 's/^1//' file.txt