data manatee;
  length month river $ 10;
  input month date plane copter river;
cards;
October 16 24 30 Crystal
October 17 31 30 Crystal
October 18 32 33 Crystal
October 19 39 38 Crystal
October 20 47 58 Crystal
February 12 47 58 Indian
February 13 35 48 Indian
February 14 76 75 Indian
February 15 95 85 Indian
February 16 85 55 Indian
;
run;