execute if block ~ ~-1 ~ minecraft:soul_sand as @e[type=item,nbt={Item:{id:"minecraft:rotten_flesh",Count:64b}},distance=..4] run tag @s add flesh1
execute if block ~ ~-1 ~ minecraft:soul_sand as @e[type=item,nbt={Item:{id:"minecraft:rotten_flesh",Count:64b}},distance=..4,tag=!flesh1] run tag @s add flesh2
execute if block ~ ~-1 ~ minecraft:soul_sand as @e[type=item,nbt={Item:{id:"minecraft:rotten_flesh",Count:64b}},distance=..4,tag=!flesh1,tag=!flesh2] run tag @s add flesh3
execute if block ~ ~-1 ~ minecraft:soul_sand as @e[type=item,nbt={Item:{id:"minecraft:rotten_flesh",Count:64b}},distance=..4,tag=!flesh1,tag=!flesh2,tag=!flesh3] run tag @s add flesh4

execute if block ~ ~-1 ~ minecraft:quartz_block as @e[type=item,nbt={Item:{id:"minecraft:bone",Count:64b}},distance=..2] run tag @s add bone1
execute if block ~ ~-1 ~ minecraft:quartz_block as @e[type=item,nbt={Item:{id:"minecraft:bone",Count:64b}},distance=..2,tag=!bone1] run tag @s add bone2
execute if block ~ ~-1 ~ minecraft:quartz_block as @e[type=item,nbt={Item:{id:"minecraft:bone",Count:64b}},distance=..2,tag=!bone1,tag=!bone2] run tag @s add bone3
execute if block ~ ~-1 ~ minecraft:quartz_block as @e[type=item,nbt={Item:{id:"minecraft:bone",Count:64b}},distance=..2,tag=!bone1,tag=!bone2,tag=!bone3] run tag @s add bone4

execute if entity @e[tag=flesh1] if entity @e[tag=flesh2] if entity @e[tag=flesh3] if entity @e[tag=flesh4] if entity @e[tag=bone1] if entity @e[tag=bone2] if entity @e[tag=bone3] if entity @e[tag=bone4] run tag @s add fleshAndBonesPresent