拿這個“str”“ABCDE”來說，它有以下"AB", "ABC", "ABCD","ABCDE","DE", "CDE", "BCDE", "CD","BC"關于順序的組合。我試過//  thi is javascript code            const val = 'ABCDE'            let array = []            for (i = 0; i < val.length-1; i++) {                  array.push(val.slice(i,val.length))                  array.push(val.slice(0,i+2))                  array.push(val.slice(i,val.length-i))                  }                  console.log(                  array,                  array.includes('BC'),                  array.includes('CD')                  )// this is the reuslts: ["ABCDE", "AB", "ABCDE", "BCDE", "ABC", "BCD", "CDE", "ABCD", "C", "DE", "ABCDE", ""]//this reslutes don't have compnations like 'BC' or 'CD'我沒有真正得到我需要的結果。您對 javascript 或 python 有什么想法嗎？我認為 pythonpanda或可能NumPy庫有這樣的東西。