题解 | #字符串分隔#

const readline = require('readline')
var rl = readline.createInterface({
    input:process.stdin,
    output:process.stdout
})
var arr=[]
var num = 0
rl.on('line',(line)=>{
    let newline = line.toLowerCase()
    arr.push(newline)
    if(arr.length>1){
        var index = arr[0].indexOf(arr[1])
        while(index!=-1){
            num++
            index = arr[0].indexOf(arr[1],index+1)
        }
        console.log(num)
    }
})