rm *.1
rm *.2
rm *.3
rm *.4
rm *.5
rm *.6
rm *.7
rm *.8
rm *.9
rm *.10
rm *.11
rm *.12
rm *.13
rm *.14
rm *.15
rm *.16
rm *.17
rm *.18
rm *.19
rm *.20
