import sys, time
def inc(i):
    return i+1

def dec(i):
    return i-1

func = [inc, dec]

s = input("Say something: ")

ll =len(s)
hl = ll+50
i = ll
d = 0

while True:
    print(format(s, '>'+str(i)) + " ", end='\r')
    time.sleep(.05 if i>0 else 0)
    i = func[d](i)
    d = 1 if d==0 and i>hl else d
    d = 0 if d==1 and i<ll else d