PowerShell, 107 98 82 77 bytes

$l=@{} $args|%{if($_-10){$l.$_+=$x++,+$y}else{$x=0;++$y}} $l|% v*|? c*t -eq 2 

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Takes a splatted string with LFs. Returns zero-indexed location x,y. Unrolled:

$l=@{} # make a hashtable. key=char, value=array of locations $args|%{ if($_-10){ # if current char is not LF $l.$_+=$x++,+$y # move location to next pos and add location to hashtable value }else{  # else  $x=0;++$y # move location to next line } } $l|% Values|? Count -eq 2 # find and output location array with 2 elements (x and y) 

PowerShell, 107 98 82 77 bytes

$l=@{} $args|%{if($_-10){$l.$_+=$x++,+$y}else{$x=0;++$y}} $l|% v*|? c*t -eq 2 

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Takes a splatted string with LFs. Returns zero-indexed location x,y. Unrolled:

$locations=@{} # make a hashtable. key=char, value=location array $args|%{ if($_-10){  # if current char is not LF $locations.$_+=$x++,+$y # add $x,$y to hashtable value and move $x to next pos }else{   $x=0;++$y # move $x,$y to next line } } $locations|% Values|? Count -eq 2 # find and output location array with 2 elements (x,y) 

PowerShell, 107 98 82 bytes

$l=@{} $args|%{if($_-10){$l.$_+=++$x,($y+1)}else{$x=0;++$y}} $l.Values|? C*t -eq 2 

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Takes a splatted string with LFs. Returns one-indexed location x,y. Unrolled:

$l=@{} # make a hashtable. key=char, value=array of locations $args|%{ if($_-10){ # if current char is not LF $l.$_+=++$x,($y+1) # move location to next pos and add location to hashtable value }else{ # else $x=0;++$y # move location to next line } } $l.Values|? Count -eq 2  # find and output location array with 2 elements (x and y) 

PowerShell, 107 98 82 77 bytes

$l=@{} $args|%{if($_-10){$l.$_+=$x++,+$y}else{$x=0;++$y}} $l|% v*|? c*t -eq 2 

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Takes a splatted string with LFs. Returns zero-indexed location x,y. Unrolled:

$l=@{} # make a hashtable. key=char, value=array of locations $args|%{ if($_-10){ # if current char is not LF $l.$_+=$x++,+$y  # move location to next pos and add location to hashtable value }else{ # else $x=0;++$y # move location to next line } } $l|% Values|? Count -eq 2 # find and output location array with 2 elements (x and y) 

PowerShell, 107 98 bytes

$z=-join$args-match'(.)\1' $h=$Matches[1] switch -r($args){.{++$x}\n{$x=0;++$y}"[^$h\n]"{$x;$y+1}} 

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Takes a splatted string with LFs. Returns one-indexed location x,y.

PowerShell, 107 98 82 bytes

$l=@{} $args|%{if($_-10){$l.$_+=++$x,($y+1)}else{$x=0;++$y}} $l.Values|? C*t -eq 2 

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Takes a splatted string with LFs. Returns one-indexed location x,y. Unrolled:

$l=@{} # make a hashtable. key=char, value=array of locations $args|%{ if($_-10){ # if current char is not LF $l.$_+=++$x,($y+1) # move location to next pos and add location to hashtable value }else{ # else $x=0;++$y # move location to next line } } $l.Values|? Count -eq 2 # find and output location array with 2 elements (x and y)