Iwan has written a letter to Dian. Something about climbing a tree and putting something in it. Plus something about a riddle or answering a question. Perhaps you can decipher it.
052|011|107|157 166|088|108|098 076|176|175|005, 144|049|064|188 091|068|032 036|146|031 062|105|093|161|061|059|024|084 053|195|115|195|061 080|011 006|195|121|049 142|166|040|061|187|135. 106|090|057|136|053|039 193|137|134 029|071|077|198|061|059|099|038 179|082|144|082|056? 170|162|190|089 185|125|143|043 021|151|085 199|125|050|094|026 147|006|010 142|074|089|193|008|127 095|156|146|192|177|111 063|016|009|131|069|072|133|197 053|195|143|082|081. 092|167|101|130 144|036|100|055 149|023|188 172|106|152 059|183|164|096 062|139|077|070|078|001|023|075 079|087|095|134|151|084|134 119|027 053|082|115|195|196 188|197|134. 017|194|035|037|001|163|002|005|010 140|123|075|175|008|027: 042|175|044|068 112|123|023|072|133|094|131|140 053|187|000|158|176|008|166|190|051|196 119|091 180|125|094|192|050, 021|109|029|010|153|162|025|068 112|156|077|070|078|010|106|137|117|061 072|126|094|096|076|046|108|068|030|002 021|123 080|147|012|051|112 037|074|064|181|011|197|003|040|071. 092|109|083|003|079, 170|111|116|057 062|090|157|154|075|134|061|049|137|161|008 149|085|086|195|150|112|049|095|032 135|107|169|164 189|020|099 132|011 079|027|092|152|066 027|084|043 031|023|121|134|021 093|018|108|037|126|067|091 160|195|165|193|022|174 173|082|050|195|061 135|198|023|127 106|031|179|168|157|072|025|181. 121|016|150|152|095, 132|149|167|085 023|099|175|005 165|139 186|158|167|095 183|145|181|152|028 093|074|057|098|088|062|140|102|177 180|070|067|192|008|154 030|024|085|171 165|129|101|186|022|176|085|098 040|032 045|102|121|043. 112|129|153|161|138 142|016|005|049|114|032, 140|003|028|151|085? 066|109|199|087|038|152|177|157|178|024, 173|139|191|148|128|008|135|151|039|145 030|161|145|127 048|183|053|110|114|011|143 192|171|172|137 078|043|122|141|148. 179|139|000|185|193|085|030|001|128|145 027|038|182 096|153|049|155|070|138 066|071|029|176|037|025|112 185|109|097|099-197|187|106|110 079|071|140|139|068|044|083|169|135|198. 119|111|002|085 022|010|137|161 034|139|005|088-197|194|097|111, 140|010|005|024|163. 170|133|068 179|136|045|185|011 095|152|021|128 022|019|005|159|122|027 148|109|005|116-148|016|137|149 166|033|085|154 165|134|199|183|136|084. 175|057|102|177|099|143 053|074|073|121|025|085|166|120|044|169|068|135|168: 042|174 118|044|023|015|010|023|154, 098|018|153|031|157|184 133|041|176 199|102|078|168 015|111|077|033|028|025|196? 020|032|116|163 173|172|045|034|162 197|131|144|010, 048|125|150|018|108|049 052|182|114|183 119|027|051|069 121|055|035|075|171|172|114 020|102 137|082|181|147 102|014|182. 156|138, 142|183|191|186|038 174|163|149 138|044|112|179|054|083 142|156|177|194|047|107|027, 092|151|101|162 001|048|182 199|187|160|031|029 047|018|004|041|120|034 062|019|062|036|006|107|141 060|009|053|117|092 138|003|150|183|086. 138|010|000|152|086 124, 062|091|079|107|012|196|178|198. 009|003|015|001|144-077|129|119|172|144|107|061 170|188|133|085 112|168|142|175|115 140|175|066|125 062|187|163|020|123|146|083|110|179|022|110 142|134|017|002|084 130|068|091. 047|120|160|107|009, 188|094|193|157.
You can validate your puzzle solution with
certitude.
It might help to download the cartridge from https://www.wherigo.com/cartridge/details.aspx?CGUID=dcdcd2ff-c171-4487-93bc-678f6d03ac4f