Lua - 使用string.gsub出现密码逻辑错误，加密输出不是输入

程序似乎出现了逻辑错误。我已经多次检查了它，甚至编写了另一个类似的程序（也似乎有相同的错误）。虽然我认为这可能涉及到我的字符串替换的使用，但我无法弄清楚出了什么问题......

repeat
local file = io.open("out.txt", "w")
print("would you like to translate Cipher to English or English to Cipher?")
print("enter 1 for translation to English. enter 2 for translation to Cipher")
tchoice=io.read()
if tchoice=="2" then
print(" enter any text to translate it: ")
rawtextin=io.read()
text=string.lower(rawtextin)
text1=string.gsub(text,"a","q")
text2=string.gsub(text1,"b","e")
text3=string.gsub(text2,"c","h")
text4=string.gsub(text3,"d","c")
text5=string.gsub(text4,"e","j")
text6=string.gsub(text5,"f","m")
text7=string.gsub(text6,"g","r")
text8=string.gsub(text7,"h","g")
text9=string.gsub(text8,"i","b")
text10=string.gsub(text9,"j","a")
text11=string.gsub(text10,"k","d")
text12=string.gsub(text11,"l","y")
text13=string.gsub(text12,"m","v")
text14=string.gsub(text13,"n","z")
text15=string.gsub(text14,"o","x")
text16=string.gsub(text15,"p","k")
text17=string.gsub(text16,"q","i")
text18=string.gsub(text17,"r","l")
text19=string.gsub(text18,"s","f")
text20=string.gsub(text19,"t","s")
text21=string.gsub(text20,"u","w")
text22=string.gsub(text21,"v","t")
text23=string.gsub(text22,"w","p")
text24=string.gsub(text23,"x","u")
text25=string.gsub(text24,"y","n")
text26=string.gsub(text25,"z","o")
text27=string.gsub(text26," ","@")
print(text27)
elseif tchoice=="1" then
print("enter text!")
rawtextin=io.read()
text=string.lower(rawtextin)
text1=string.gsub(text,"q","a")
text2=string.gsub(text1,"e","b")
text3=string.gsub(text2,"h","c")
text4=string.gsub(text3,"c","d")
text5=string.gsub(text4,"j","e")
text6=string.gsub(text5,"m","f")
text7=string.gsub(text6,"r","g")
text8=string.gsub(text7,"g","h")
text9=string.gsub(text8,"b","i")
text10=string.gsub(text9,"a","j")
text11=string.gsub(text10,"d","k")
text12=string.gsub(text11,"y","l")
text13=string.gsub(text12,"v","m")
text14=string.gsub(text13,"z","n")
text15=string.gsub(text14,"x","o")
text16=string.gsub(text15,"k","p")
text17=string.gsub(text16,"i","q")
text18=string.gsub(text17,"l","r")
text19=string.gsub(text18,"f","s")
text20=string.gsub(text19,"s","t")
text21=string.gsub(text20,"w","u")
text22=string.gsub(text21,"t","v")
text23=string.gsub(text22,"p","w")
text24=string.gsub(text23,"u","x")
text25=string.gsub(text24,"n","y")
text26=string.gsub(text25,"o","z")
text27=string.gsub(text26,"@"," ")
print(text27)
end
print("writing to out.txt...")
file:write(text27)
file:close()
print("done!")
print("again? type y for yes or anything else for no.")
again=io.read()
until again~="y"
x=io.read()

代码没有错误 - 我错过了什么吗？我已经意识到这不是最有效的方法，但我需要先弄清楚出了什么问题，然后再写一个更有效的程序使用循环和表格。

样例运行（仅显示重要数据）：

in:2
in:hi test
out:gb@safs
in:y
in:1
in:gb@safs
out:hq vjvv