3. itemize 环境行的填充

Question

继续话题： 填充第 2 行 itemize

现在我想要第 3 行而不是第 2 行：字符（x1 x1 x1 x1）或（x2 x2 x2 x2）或（x3 x3 x3 x3）始终位于第 3 行结尾的位置。

前任：

项目 1： a1 a1 a1

2. 排

3. 行 x1 x1 x1 x1

项目 2：a2 a2 a2

a2 a2 a2

a2 a2 x2 x2 x2 x2

项目 3：a3 a3 a3

a3 a3 a3 x3 x3 x3 x3

\documentclass{article}
\usepackage{tikz}
\usepackage{tcolorbox}
\tcbuselibrary{poster}

\usepackage{bbding}
\usepackage{pifont}
\usepackage{enumitem}

\begin{document}
\begin{tcbposter}[
  poster = {
    columns=1,
    rows=2,
    spacing=3mm,
    height=14cm,
    width=12cm,
  },
]

\posterbox[colframe=red,width=4cm,height=4cm]{column=1}{
 \begin{itemize}[leftmargin=1em]
    \item \tikz[baseline={(x.base)}] {
        \node[text width=\linewidth,%draw,
              inner sep=0pt,
              text depth=\baselineskip,
              align=justify] (x) {a1};
        \node[inner sep=0pt,
              anchor=base east,
              font=\color{blue}] at (x.south east) {x x x};
    }
    \item \tikz[baseline={(x.base)}] {
        \node[text width=\linewidth,
              inner sep=0pt,
              text depth=\baselineskip,
              align=justify] (x) {This will break to three lines};
        \node[inner sep=0pt,
              anchor=base east,
              font=\color{red}] at (x.south east) {x x x};
    }
    \item \tikz[baseline={(x.base)}] {
        \node[text width=\linewidth,
              inner sep=0pt,
              text depth=\baselineskip,
              align=justify] (x) {cccc2  ccccc cccc ccc};
        \node[inner sep=0pt,
              anchor=base east,
              font=\color{green}] at (x.south east) {x x x};
    }
\end{itemize}
}
\end{tcbposter}
\end{document}

谢谢