Trivial deadfish substitution

A trivial deadfish substitution is a trivial substitution into deadfish.

Because of how halting works in deadfish, there are two arities of substitution, with five commands and four commands respectively. To program in the five-command variant TrivialDeadfishSubstitution("a", "b", "c", "d", "e"), first program in deadfish, then perform the following substitution:

Deadfish	Substitution argument	Description
i	"a"	increment
d	"b"	decrement
s	"c"	square
o	"d"	output
h	"e"	halt

To program in the four-command variant TrivialDeadfishSubstitution("a", "b", "c", "d"), first truncate the input program before the first "h", then apply the above substitution, ignoring the final row.

Examples

These examples include languages which are precisely trivial deadfish substitutions as well as languages which contain trivial deadfish substitutions as subsets. For example, a subset of four commands of 嘭！哐！叮！呲！咣！ is a trivial deadfish substitution, but the entire language has extra commands which do not correspond to deadfish.

Five-command

Language	Trivial deadfish Substitution
Standard Deadfish	TrivialDeadfishSubstitution("i", "s", "d", "o", "h")
Sakana variation	TrivialDeadfishSubstitution("増", "減", "乗", "出", "停")
Pește mort	TrivialDeadfishSubstitution("c", "s", "p", "i", "o")
Numbered DeadFish	TrivialDeadfishSubstitution("1", "2", "3", "4", "5")

Four-command

Language	Trivial deadfish Substitution
Standard Deadfish	TrivialDeadfishSubstitution("i", "s", "d", "o")
XKCD variation	TrivialDeadfishSubstitution("x", "d", "k", "c")
f() variation	TrivialDeadfishSubstitution("f", "f()", "f ()", "f(())")
F!--	TrivialDeadfishSubstitution("F!", "U!", "C!", "K!")
嘭！哐！叮！呲！咣！ variation	TrivialDeadfishSubstitution("嘭！", "哐！", "叮！", "呲！")
ΙΧΘΥΣ variation	TrivialDeadfishSubstitution("ι", "χ", "θ", "υ")