function jiaoji(){
data=echo "$1" "$2" | tr ' ' '\n' | sort | uniq -d | tr '\n' ' '
echo $data
}

function bingji(){
data=echo "$1" "$2" | tr ' ' '\n' | sort | tr '\n' ' '
echo $data
}

function chaji(){

2

data=echo "$1" "$2" "$2" | tr ' ' '\n' | sort | uniq -u | tr '\n' ' '
echo $data
}