撰寫程式讀取一個字串內容 p，試著提取字串裡的英文字母，並按照 a-z 和 A-Z 順序輸出。

ws=("Hello, Taiwan.","This site is AWESOME.","Linear and low-dropout (LDO) regulators are a simple,","Hello $hjelJohn_qyRETT5%")

def revstr(instr):

    wss=[x for x in instr]

    temp1=[]

    temp2=[]

    for loops in range(len(wss)):

        if (wss[loops] >="A" and wss[loops] <="Z"):

            temp1.append(wss[loops])

        elif (wss[loops] >="a" and wss[loops] <="z"):

            temp2.append(wss[loops])

    temp1.sort()

    temp2.sort()

    temp =''.join(temp2)+''.join(temp1)

    return(temp)

for i in range(len(ws)):

    print(revstr(ws[i]))