ex 2 s10

def saisie():
    ch=input("enter ch:")
    return ch
def palindrome(ch):
    test=True
    i=0
    j=len(ch)-1
    while test==True and j!=0 and i!=len(ch):
        if not (ch[i].upper()==ch[j].upper()):
            test=False
    return test==True
def tpal(ch):
    x=""
    for i in range(len(ch)):
        for j in range(len(ch)-1,0,-1):
            if palindrome(ch[i:j])==True:
                x=ch[i:j]+","+x
    return ch[:-1]
ch=saisie()
print("les chaines suivantes:",tpal(ch))