states = ('q0', 'q1', 'q2')
start = 'q0'
accept = ('q0',)

s = input()
currentState = start
current_i = 0

# if I am at character i, can I reach an accepting state?
def doesAccept(current_i):
    # did we reach the end of the string?
    if i >= len(s):
        if currentState in accept: return True
        else: return False
        
    currentLetter = s[current_i]

    if currentState == 'q0' and currentLetter == '0'
        currentState = 'q1'
        if doesAccept(current_i+1): return True
        
        else:
            currentState = 'q3'
            if doesAccept(current_i+1): return True
            else: return False
    elif currentState == 'q0' and currentLetter == '1'
        return False

    if currentState == 'q1' and currentLetter == '0'
        return False
    elif currentState == 'q1' and currentLetter == '1'
        currentState = 'q2'
        return doesAccept(current_i+1)

    # note - still need q2, q3...

    else: print('THIS SHOULD NOT HAPPEN')

if doesAccept(0): print("accept"); print("yes, accept")
else: print("reject")