def λ(A):
    A = A.replace(" ", "")
    r1=r2=r3=r4=r7=0
    r5=1
    p=0

    while p < len(A):
        r6 = A[r5-1] + A[r5]

        if r6 == "λλ":
            r1 = (r1 + 1) % 256
        elif r6 == "λx":
            if r1 == 0:
                r1 = r2
            else:
                r2 = r1
        elif r6 == "λΛ":
            r1 = 0
        elif r6 == "Λλ":
            print(chr(r2), end="")
        elif r6 == "Λx":
            r1 *= 2
        elif r6 == "ΛΛ":
            if r7 == 0:
                r7 = 1
                r3 = r5
                r4 = r1
            elif r4 < 1:
                r7 = 0
            else:
                r5 = r3
                r4 -= 1

        r5 += 2
        p += 2
λ("λλΛxΛxΛxΛxΛxΛxΛΛΛλΛΛ")