\documentclass[tikz]{standalone}
\usepackage{amsmath}
\usepackage[T1]{fontenc}
\begin{document}
% generated by Plantuml 1.2026.8beta1  
\definecolor{plantucolor0000}{RGB}{255,255,255}%
\definecolor{plantucolor0001}{RGB}{24,24,24}%
\definecolor{plantucolor0002}{RGB}{226,226,240}%
\definecolor{plantucolor0003}{RGB}{0,0,0}%
\begin{tikzpicture}[yscale=-1
,pstyle0/.style={color=plantucolor0000,line width=0.0pt}
,pstyle1/.style={color=plantucolor0001,line width=0.5pt,dash pattern=on 5.0pt off 5.0pt}
,pstyle2/.style={color=plantucolor0001,fill=plantucolor0002,line width=0.5pt}
]
\draw[pstyle0] (25.9688pt,39pt) rectangle (33.9688pt,84pt);
\draw[pstyle1] (29.4688pt,39pt) -- (29.4688pt,84pt);
\draw[pstyle0] (77.6625pt,39pt) rectangle (85.6625pt,84pt);
\draw[pstyle1] (81.1625pt,39pt) -- (81.1625pt,84pt);
\draw[pstyle2] (10pt,15pt) arc (180:270:5pt) -- (15pt,10pt) -- (43.9375pt,10pt) arc (270:360:5pt) -- (48.9375pt,15pt) -- (48.9375pt,33pt) arc (0:90:5pt) -- (43.9375pt,38pt) -- (15pt,38pt) arc (90:180:5pt) -- (10pt,33pt) -- cycle;
\node at (17pt,17pt)[below right,color=black,inner sep=0]{Bob};
\draw[pstyle2] (58.9375pt,15pt) arc (180:270:5pt) -- (63.9375pt,10pt) -- (98.3875pt,10pt) arc (270:360:5pt) -- (103.3875pt,15pt) -- (103.3875pt,33pt) arc (0:90:5pt) -- (98.3875pt,38pt) -- (63.9375pt,38pt) arc (90:180:5pt) -- (58.9375pt,33pt) -- cycle;
\node at (65.9375pt,17pt)[below right,color=black,inner sep=0]{Alice};
\draw[pstyle2] (10pt,89pt) arc (180:270:5pt) -- (15pt,84pt) -- (43.9375pt,84pt) arc (270:360:5pt) -- (48.9375pt,89pt) -- (48.9375pt,107pt) arc (0:90:5pt) -- (43.9375pt,112pt) -- (15pt,112pt) arc (90:180:5pt) -- (10pt,107pt) -- cycle;
\node at (17pt,91pt)[below right,color=black,inner sep=0]{Bob};
\draw[pstyle2] (58.9375pt,89pt) arc (180:270:5pt) -- (63.9375pt,84pt) -- (98.3875pt,84pt) arc (270:360:5pt) -- (103.3875pt,89pt) -- (103.3875pt,107pt) arc (0:90:5pt) -- (98.3875pt,112pt) -- (63.9375pt,112pt) arc (90:180:5pt) -- (58.9375pt,107pt) -- cycle;
\node at (65.9375pt,91pt)[below right,color=black,inner sep=0]{Alice};
\draw[color=plantucolor0001,fill=plantucolor0001,line width=1.0pt] (69.1625pt,62pt) -- (79.1625pt,66pt) -- (69.1625pt,70pt) -- (73.1625pt,66pt) -- cycle;
\draw[color=plantucolor0001,line width=1.0pt] (29.4688pt,66pt) -- (75.1625pt,66pt);
\node at (36.4688pt,51pt)[below right,color=black,inner sep=0]{hello};
\end{tikzpicture}%
\end{document}
