in TeX:
\def\a{mess}\def\b{age}\csname \a\b \endcsname {Hello there}\bye
in (UCB)LOGO:
? run list word "pri "nt [Hello there]
\def\a{mess}\def\b{age}\csname \a\b \endcsname {Hello there}\bye
in (UCB)LOGO:
? run list word "pri "nt [Hello there]
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