How to find some random characters in hoziontal setting

Hi guys,

I have to find a few random characters from one imagine, but they are placed in vertical lines, one under another. Due to this common Tesseract cant help, That is why i tried with "detectTextRectangles()" but it doesnt work properly to. I tried creating new neutral network but creating this take so much time that i am not willing to have blind trials So maybe somebody of you know what to do?
kontener-20-cutted_2

example image, please …

Yeah right, i`ve just added to orginal post.

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