import textwrap
import difflib

def onestepchange(start, dest):

    ret = ""

    for i, s in enumerate(difflib.ndiff(start, dest)):
        #print("i: ", i)
        #print("S: ", s)

        # Remove a character from the start.
        if s[0] == '-':
            #print("ret1")
            return ret + start[i+1:]

        # Add a character.
        if s[1] == '+':
            #print("ret2")
            return ret + s[-1] + start[i:]

        # Keep moving through the stream.
        ret = ret + s[-1]

        # If we're at the length of the starting string plus one, then we've
        # added our one character. Let's bounce.
        if len(ret) > len(start):
            #print("ret3")
            return ret

        
        if ret[i] != start[i]:
            #print("ret4")
            return ret + start[i:]
    
    # Hack.
    if ret == "":
        return dest

    #print("ret5 - ret")
    return ret

def countsteps(start, dest):
    step_count = 0
    while start != dest:
        start = onestepchange(start, dest)
        step_count += 1
    return step_count