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"1abc25hriwm4" // usage: 0 π’ Ξ»(<5) Ξ»(1+) π¬βοΈ π¬ β Ξ» ( / evaluate the condition / Ξ»(π’πͺ£βοΈ)ββ π ( / evaluate the body / π’βοΈ / recurse / π¬βοΈ ) ) // { str β int } line β Ξ» ( '0'>π'9'<π '9'- β¬ β‘π΄ 10Γ+ ) π’β’'\n'π§ / run function on all values, pushing to the stack / βοΈline / reduce the stack / βοΈ+