cnc_tool_changer

tool_magazine = {}

spindle = {0: 0}

for i in range(1,  10 + 1):
    key = i
    tool = i
    tool_magazine[key] = tool

tool_number = input()

while True:
    if tool_number == "end":
        break
    if spindle[0] == 0:
        for x in tool_magazine:
            if tool_magazine[x] == int(tool_number):
                spindle[0] = int(tool_number)
                tool_magazine[x] = 0
                break
    elif spindle[0] != 0:

        if spindle[0] == int(tool_number):
            pass
        else:
            for y in tool_magazine:
                change_tool = spindle[0]
                if tool_magazine[y] == int(tool_number):
                    spindle[0] = int(tool_number)
                    tool_magazine[y] = change_tool
                    break
    tool_number = input()

print(tool_magazine)